# Best Laptop Power Banks in 2022 – Buying Guide. Notebook power bank

## Best Laptop Power Banks in 2022 – Buying Guide

If you use a laptop you are probably familiar with one of 2 these situations:

• Your laptop is going to run out of battery and you forgot its charger at home.
• Your laptop battery is old (needs to be replaced) and you always need to plug it into the wall.

Well, besides charging mobile phones and other gadgets, did you know you can use a power bank to charge a laptop?

Certainly, a power bank can perform the same function as a laptop charger, although you should know that, obviously, its power is limited and not just any model will do.

For a power bank to really work as a replacement for a charger, it must meet a series of requirements:

• Connector: include a cable with a connector compatible with the laptop’s charging port.
• Voltage (V): same working voltage.
• Power (W): same or greater power supplied.

In this guide, we will learn how to identify a laptop power bank taking into account the above requirements, and, as always, we will recommend the best models available on Amazon.

• 1 Features of a laptop charger
• 2 Using a power bank as a laptop charger
• 2.1 Charging port
• 2.2 Output port voltage (V) ❗
• 2.3 Power supplied (W)
• 4.1 Calculating the average power consumption of our laptop
• 4.2 Calculating the useful energy of a power bank for laptop charging
• 4.3 Calculating the usage time of a laptop with a power bank
• 4.4 Conclusions and general formula
• 5.1 1. Choosing the type of laptop power bank
• 5.2 2. Laptop usage time with a power bank
• 5.3 3. Test results of charging a laptop with a power bank

## Features of a laptop charger

First of all, we need to know the specifications of our laptop charger in order to find a power bank that meets the same requirements.

In the following image we can see the specifications of a laptop charger:

We must check the output parameters (Output):

This means that this charger works at a voltage of 19.5V (volts) and supplies a maximum current of 4.26A (amps).

This charger does not indicate the maximum power that it can supply but we can easily obtain it by multiplying the voltage by the current:

With this information, we already know the charging voltage (19.5V) of our laptop and the recommended power (90W) that our power bank should supply.

It is very important to know this voltage because if we connect it to a charger (or power bank) that works at a higher voltage we could damage it irreversibly.

## Using a power bank as a laptop charger

Next, we need to find a power bank that replaces our charger and meets the following characteristics:

### Charging port

A laptop can be powered through a power bank in 3 different ways, depending on the OUTPUT port it has:

There are 3 types of laptop power banks on the market:

If we use a specific power bank with a DC output it is important to check its output voltage and if it includes a connector compatible with the charging port of your laptop.

Although, generally, this type of model usually includes a set of adapters compatible with the main laptop brands:

### 5 Best Laptop Power Banks 2023 | Best Laptop Charger 2023

• The difficulty in finding a model compatible with the laptop (either by the output voltage or the connector).
• They require a specific AC charger to recharge them (like a laptop charger).
• They are usually very bulky.

Another option is those power banks that include a 220V AC port.

In this case, we do not have to worry about incompatibilities since we can directly connect the charger of our laptop (or any other device) as if we were doing it to the wall socket. Sounds good right?

However, there are also some drawbacks:

• Large dimensions
• Part of the energy of the power bank is lost when using the charger of the device (in this case the laptop) as an intermediary.

A new way to power your laptop is by using a power bank with a USB-C output port with Power Delivery charging technology.

USB Type-C (USB-C) is the future of connectivity, allowing you to connect and charge any type of device (mobile, tablet, laptop, camera…) using a single universal power port, forget about searching for cables and compatible connectors.

On the other hand, Power Delivery (PD) is the technology that allows powering high-power devices – such as a laptop, through the USB-C port.

Nowadays there are many new generation laptops that use USB Type-C as a power port. In these cases, you simply need to look for a power bank with Power Delivery that is compatible with the charging voltage of your laptop.

But, what if my laptop does not have a USB-C charging port?

Is it possible to charge it with a power bank with USB-C PD?

We are aware that many users do not have a last-generation laptop, in this case, we would need to use a special adapter or cable that has a USB-C connector (power bank) on one end and an INPUT DC connector (laptop) on the other end.

This adapter or cable incorporates a trigger capable of demanding power in Power Delivery to the power bank at a certain voltage: to date, we have found 2 models for 15V and 20V, but we do not know if in the future they will be manufactured at other voltages.

For this reason, we must pay attention to the voltage when buying this cable, since if we make a mistake in choosing it we could seriously damage our laptop.

If we connect a 15V PD trigger cable to a laptop charging at 20V, it will not be able to start charging = for a 20V laptop we need a 20V PD trigger cable.

On the other hand, if we connect a 20V PD trigger cable to a laptop charging at 15V, WE COULD IRREVERSIBLY DAMAGE OUR LAPTOP = for a 15V laptop we need a 15V PD trigger cable.

### Output port voltage (V) ❗

Depending on the type of power bank we need to check for which voltages its output port works to know if it is compatible with the charging voltage of our laptop:

If we use a power bank with AC output port it is not necessary to check the voltage because we would still power the laptop with its own charger (which is already in charge of transforming the 220V voltage to the charging voltage of the laptop).

On the other hand, if we choose to buy a power bank with DC or USB-C PD output port, it is very important to check that this port has the same voltage as your laptop charger, otherwise you could irreversibly damage your laptop.

This output voltage will always be indicated in the power bank specifications as “DC Output” or “USB-C Output”.

Actually, any electronic device must withstand a voltage of.10% of its nominal voltage. that is:

If your laptop charges at 19.5V, it can take a maximum voltage of 21.45V (19.5V1.95V), therefore, a 20V power bank could be connected to it.

In addition, it is necessary to take into account the voltage drop that occurs in the cable connecting the power bank and the laptop, which varies between 0.15 and 0.2V (depending on the resistance of the cable itself) for each meter of length.

For example, if the output voltage of the power bank is 20V, the laptop would receive a voltage of 19.8V (20V-0.2V).

On the other hand, we can also find models that may have one or more DC output ports with a fixed voltage or a single multi-voltage DC port, whose voltage can be selected (by pressing the “Power” button) to the charging voltage of our laptop.

Obviously, if we were to use a power bank with AC output it is not necessary to check the voltage because we would continue to power the laptop with its own charger (which is already in charge of transforming the 220V voltage to the computer charging voltage).

### Power supplied (W)

Finally, we must take into account the maximum power that can be supplied by the output port of the power bank:

If the charger of our laptop is 65W then it is advisable to use a power bank that is capable of providing the same or higher power than the charger. because, otherwise, the computer would not even start up as it needs the maximum power during its start-up (and subsequent use) at the same time as it recharges its battery.

However, in the following section we will look at some situations in which it is possible to use a lower power model:

## How much power does a power bank need to charge a laptop?

Depending on the laptop model, its charger will be designed to supply a maximum power, i. e: 45, 65, 90, or even 130 watts (W).

We may not find a power bank that provides the same or a higher power than our laptop charger either by specifications or budget. In this situation, we can also buy a lower-powered power bank.

Let’s say we are working in a coffee shop with our Lenovo Z50-70 laptop (its charger is 65W) and we run out of battery.

We could use a 65W power bank or resort to a lower power one, for example, 45W, to be used under certain conditions:

If we remove the battery from the laptop, the power of the power bank needed to continue working with the laptop will be lower than the power provided by its charger. since in this case, the energy needed to recharge its battery is not necessary.

We should also consider, that the power required during the start-up of a laptop is always higher than the average working power, due to the extra current peak that is produced.

A little trick to avoid the current peak at start-up would be to activate the sleep mode when the laptop indicates that its battery is running low. (Normally it goes to sleep a few seconds after closing the lid if the laptop has been configured this way).

Next, we connect the power bank and then remove the battery from the laptop.

If we deactivate the sleep mode (open the lid) we could enjoy the energy of the power bank without “suffering” that extra consumption of energy during startup.

In this scenario, we could use a power bank that supplies at least 70% of the power of our laptop charger. That is to say, if our charger is 65W, the power of the power bank should be at least 45W.

Another option would be to keep the laptop turned off while recharging.

In this case, we would only need the power required to recharge the laptop battery and we could use the same power bank as in the previous case (45W), i.e., supplying at least 70% of the power of our laptop charger.

If the 2 previous options do not convince you, it is possible to use a lower-powered power bank when the laptop battery is not completely discharged (usually less charging power is required after 50% battery).

This way, if we connect the power bank before the laptop battery is depleted, we also avoid the excess power demand during startup.

The problem lies in knowing our laptop’s starting peak and how much power it needs to recharge its battery when it is still half-charged. Measurements would have to be made and this is usually not within everyone’s reach.

For this reason, we think that the most advisable thing to do is to use a power bank with the same or higher power than the laptop charger in these scenarios.

## How many hours would I be able to use a laptop with a power bank?

Let’s suppose we are interested in buying a power bank to charge our laptop and we want to know how much extra time we could continue working with the power bank connected.

First of all, it is important to consider the following questions for the right choice of power bank:

• To get an idea of the average power consumption of your laptop, what kind of tasks do you usually use your laptop for? For example: surfing the web, office, gaming, watching Netflix…
• For your chosen tasks, how many hours does your laptop last with a 100% charged battery?
• What type of laptop power bank do you want to use, with DC, AC, or USB-C Power Delivery port?

Now, we are going to see an example using a laptop with the following features:

• Brand: Acer
• Model: Aspire E5-551-T2HE
• Charger: 19V/3.42A (65 W)
• Charging voltage: 19V
• Battery capacity: 45Wh
• Charging port: DC jack 5.5 x 1.7 mm
• Battery life 100%: 3.5h

Although our Acer laptop has a DC charging port, we decided to purchase a power bank with a USB-C PD port along with a USB-C PD to DC adapter cable:

• Brand: Litionite
• Model: Vulcan 20000mAh PD 65W
• Battery capacity: 74 Wh (20000 mAh/3.7V)
• USB-C PD port: 5V-20V (65W max)
• PD power: 65 W
• Charging voltages: 5V- 20V (check here)
• USB-C PD to DC jack 5.5×2.1 20V cable
• Adapter: DC jack 5,5×2,1 to DC jack 5,5×1,7

Next, let’s calculate the approximate time we can use our Acer Aspire E5 laptop with the Litionite Vulcan power bank:

### Calculating the average power consumption of our laptop

If we don’t have enough knowledge or the necessary tools to measure exactly the average consumption of our computer, we can make an estimate taking into account:

• The energy stored in the laptop battery.
• The estimated duration time for the tasks we usually perform with our laptop.

The energy stored in the notebook battery – measured in watt-hours (Wh) – can be found in the specifications of the battery itself.

This data may be displayed directly or, if not, it must be calculated by multiplying the voltage (V) by the capacity (mAh) of the battery.

For example, in the battery specifications of the left image the energy stored in the battery would be 49 Wh while the image on the right would be 73.26 Wh (11.1V x 6600mAh / 1000).

The capacity of a laptop battery gradually decreases with use, consequently, the energy stored in the battery is less than that indicated in the specifications.

If you want to know the current capacity of your laptop battery and thus its stored energy, you can use a free program called HWINFO32. Just follow these steps:

• Download the portable version of the software from the official website. Choose the Local (USA) option.
• Accept Windows permissions (it is a secure application, it only displays information about your system and components).
• The HWiNFO32 welcome screen opens, then press the Run key.
• On the left side of the main screen, click on the Smart Battery option.
• On the right side of the same screen, information about your laptop’s battery will appear:
• Designed capacity: this is the maximum capacity (mWh) that the battery had at the factory.
• Full charge capacity: is the current capacity (mWh) of the battery.
• Wear level: wear level (%) of the battery.

Once we know the energy stored in the laptop battery we must divide by the time (expressed in hours) that the laptop lasts when its battery is fully charged (100%):

Average Laptop Power Consumption (W) = Battery Energy (Wh) / Time of use (h)

In our example, the Acer Aspire E5 laptop battery is 45 Wh and we have about 3.5 hours to use it for everyday tasks before its battery is completely drained.

Therefore, our laptop consumes an average of 12.9 watts (W):

Acer Power Consumption = 45 Wh / 3.5 h = 12.9 W (watts)

Of course, the consumption of our laptop and, therefore, the battery life will vary depending on the tasks we are performing at that moment.

Surfing the web is not the same as playing a game that demands maximum CPU and GPU performance, for example.

### Calculating the useful energy of a power bank for laptop charging

Once we have an estimate of the consumption of our laptop we will calculate the number of hours we could continue to use it with a power bank.

At first, one may think that one should simply apply the following formula:

Laptop usage time (h) = Power bank Energy (Wh) / Avg. Laptop Power Consumption (W) ERROR!

The above formula is not valid, as we must take into account the energy efficiency of the power bank and the laptop during the charging process as well as other factors that we will see below.

If the stored energy is not indicated in the specifications of the power bank, we can easily calculate it by multiplying the capacity of its internal battery (mAh) by its nominal voltage (V) and dividing the result by 1000:

Power Bank Stored Energy (Wh) = [Battery capacity (mAh) x Battery voltage (V) ] / 1000

The nominal battery voltage of a power bank is usually 3.7 volts, although we remind you that there are also models with 3.6, 3.8 or 3.85V batteries.

However, during the process of charging a device, this 3.7V must be transformed at the output port of the power bank to the charging voltage of the connected device, in this case, a laptop whose voltage range is usually between 12 and 20V.

There are power banks that have an efficiency higher than 90% as well as those that have an efficiency below 80%, but if the model is of a good enough quality its efficiency will be around 85%.

For more information, we invite you to read our guide on the Actual capacity and energy efficiency of a power bank.

In conclusion, the energy supplied at the USB output port of a power bank will be different from the energy stored in its battery and can be calculated by the following formula:

Power bank Useful Energy = Stored Energy x Energy Efficiency

Therefore, following our example, the useful energy that the Litionite Vulcan power bank can supply to a device would be:

Litionite Useful Energy = (74 Wh x 85) / 100 = 62.9 Wh

Once we know the power consumption of our Acer Aspire E5 and the useful energy of the Litionite Vulcan power bank, we need to know the energy required to fully recharge the laptop battery.

Remember that a laptop with DC input can be powered through a power bank in three different ways, depending on the output port (OUTPUT) that the power bank has:

Next, we are going to analyze the different “particularities” that our power bank may have depending on the output port used:

In the case of using a power bank with DC or USB-C Power Delivery output, our laptop will also have an energy cost both in recharging its own battery and in powering the laptop itself.

Therefore, and for the same reasons stated above, the energy efficiency when recharging the battery or using the laptop will be around 85%.

Being the estimated useful energy for battery recharging or laptop use:

Useful Energy = Power bank Stored Energy x 0.85 (Power bank efficiency) x 0.85 (Laptop efficiency)

Useful Energy = Power bank Stored Energy x 0.7225

If we apply the first formula with the Litionite power bank the useful energy would be:

Litionite Useful Energy = 74 Wh x 0.85 x 0.85 = 53.5 Wh

If we use a power bank with an AC port, we can connect the laptop’s own charger to this output, just as we would connect it to a wall outlet.

In this case, in addition to the above, the efficiency of the charger itself should be added (we will also consider an efficiency of 85% for the charger) and, therefore, the estimated useful energy would be:

Useful Energy = Power bank Store Energy x 0.85 (Power bank efficiency) x 0.85 (Charger efficiency) x 0.85 (Laptop efficiency)

Useful Energy = Power bank Stored Energy x 0.6141

In the case of our example with the Litionite power bank, we see that the available energy is lower:

Litionite Useful Energy = 74 Wh x 0.85 x 0.85 x 0.85 = 45.44 Wh

As we can see, if we use a power bank with AC port the usage time to power a laptop will be shorter than in the case of using a power bank with DC or USB-C PD port due to the additional power loss in the charger.

However, the convenience of being able to use the laptop’s own charger saves us from having to use additional cables that match the DC power input of our computer.

In addition, we would not have to worry about having to take a power bank that would give us in its output the charging voltage that our laptop needs, since sometimes it is not an easy task to find it.

We should only look at the power delivered by the power bank and apply the same considerations that we have already seen in the section What is the power required to charge a laptop with a power bank?

### Calculating the usage time of a laptop with a power bank

At this point, there are 3 different cases in the use of the useful energy of a power bank.

We will formulate each case to obtain a general formula for the usage time of a laptop with a power bank and then apply it to our example of the Acer Aspire E5 laptop and the Litionite Vulcan power bank.

In addition, we will compare the results obtained in each formula with the data we actually obtained in this example.

Finally, remember that this is not an exact calculation, we are talking about an estimate to help us know the approximate time of use before buying the power bank.

If we remove the battery of our laptop (in the case of being removable) and instead connect the power bank to power it, we would have an approximate time of use in hours:

Laptop usage time (h) = Power bank Useful Energy (Wh) / Avg. laptop power consumption (W)

If we apply the formula in our example:

• Acer Aspire E5 (theoretical) usage time = 53.5 Wh / 12.9 W = 4.15 h (4h 9min)
• Acer Aspire E5 usage time (actual) = 4h 37min

Another option is to recharge the battery with the laptop turned off. in this case, we can calculate the number of theoretical charges by applying the following formula:

Number of laptop charges = Power bank Useful Energy (Wh) / Laptop Battery Energy (Wh)

• Number of Acer Aspire E5 charges (theoretical) = 53.5 Wh / 45 Wh = 1.19 charges
• Number of Acer Aspire E5 charges (actual) = 1.42 charges

We can see that with the Litionite power bank we would recharge 1.19 times the Acer laptop battery, i.e. we would obtain a 100% full charge and still have enough energy left over in the power bank (8.5 Wh) for another partial charge of the laptop:

Useful energy – Laptop battery energy = 53.5 Wh – 45 Wh = 8.5 Wh

We could also calculate the theoretical usage time with the number of charges and the average consumption of our laptop:

Laptop usage time (h) = No. of charges x Laptop battery energy (Wh) / Avg. laptop power consumption (W)

• Acer Aspire usage time (theoretical) = 1.19 x 45 Wh / 12.9 W = 4.15 h (4h 9min)
• Acer Aspire usage time (actual) = 1.42 x 45 Wh / 12.9 W = 4.95 h (4h 57min)

As we can see it is 20 minutes longer than the actual usage time of case 1 with the laptop battery removed.

If we do not remove the battery (or it is not removable) and we use the computer while charging, t he power bank will power the laptop both for use and for recharging the battery itself.

For example, the useful energy of the Litionite power bank (53.5 Wh) will be divided between the use of the Acer laptop itself (with an average power consumption of 12.9W) and the recharging of its battery (45Wh).

In this case, it is difficult to formulate a method to calculate the theoretical time of use of the laptop because the energy used to recharge its battery varies for each model since the recharging speed of the laptop will be different depending on the charging system implemented by the manufacturer. That is to say, a laptop can provide 15W in 1 hour to recharge its battery while another one can provide 35W.

In our example, we found that the Litionite power bank was able to power the Acer laptop for 1.83h (1h 50min) until its useful energy was exhausted.

In addition, during this time, Litionite recharged the laptop battery up to 82% of its energy (45Wh) which allowed us to continue working for almost 3 hours more on office tasks:

Usage time with laptop battery recharged to 82% = 45Wh x 0.82 / 12.9W = 2.86h

Therefore, the total time using our Acer laptop for office tasks was 4 hours and 41 minutes:

Acer Aspire usage time (actual) = 1.83h 2.86h = 4.69h = 4 h 41 min

### Conclusions and general formula

In the first 2 cases described, we saw that the theoretical usage time was similar while the actual usage time suffered small variations.

This is because we are working with real efficiencies, both in the laptop and in the power bank and, logically, they must differ from the theoretical efficiencies (85%) that we establish as a reference for the estimated calculation when we do not know the real efficiencies.

The most common is not knowing both the real efficiency of our computer and that of the power bank we are going to use to recharge it.

We also explained in Case 3 that it is not possible to use a general formula to predict the usage time because each laptop behaves differently during its battery recharge. However, the actual results obtained are similar to the first 2 cases.

Remember that the objective is to have an idea of the time of use of our laptop before buying a power bank, for this reason, we believe that the formula of case 1 is the best option for a quick estimate:

Laptop Usage Time (h) = Power bank Useful Energy (Wh) / Average Laptop Power Consumption (W)

## Quick guide and real use cases

In this section, we will try to summarize the essential content of this guide by linking to the sections you need to consult to buy a laptop power bank.

### Choosing the type of laptop power bank

Depending on the type of output port of the power bank we will have to make several checks:

• Check the voltage (V) and power (W) of the laptop charger. Read this.
• Look for a power bank that has a DC output port with the same voltage (V) and power (W) equal to or higher than that charger. Possible problems:
• “I can’t find a model with the same voltage as my charger”. Read this.
• “I can’t find (or don’t want to spend much money) a model with the same power as my charger”. Read this.
• Check that the power bank has a cable and/or connector compatible with the charging port of the laptop.
• Check the power (W) of the laptop charger. Read here.
• Use an AC power bank with the same or higher power (W) than that charger. Possible problems:
• “I can’t find (or don’t want to spend much money) a model with the same power as my charger”. Read this.
• Check the voltage (V) and power (W) of the laptop charger. Read this.
• Look for a power bank that has a USB Type-C output port with Power Delivery (PD) technology with the same voltage (V) and equal or higher power (W) than that charger. Possible problems:
• “I can’t find a model with the same voltage as my charger”. Read this.
• “I can’t find (or don’t want to spend much money) a model with the same power as my charger”. Read this.
• Charging cable:
• If the laptop has a USB-C charging port then there would be no problem, you can use the laptop’s own charging cable.
• If the laptop has a DC charging port then you must use a special cable with an adapter that converts from USB-C PD to DC (read this) and meets the following requirements:
• Have the same charging voltage as the laptop.
• Support the maximum power supplied by the power bank using Power Delivery technology.
• The DC connector of the cable is compatible with the DC port of the laptop.

### Laptop usage time with a power bank

Once you have chosen the power bank, we will theoretically calculate the estimated time you could use your laptop for a certain regular activity (watching Netflix, YouTube, office tasks, surfing the Internet, playing online games…) depending on the charging method: laptop battery removed, laptop turned off or using the laptop while charging:

• Check the average duration (in hours) of the laptop with the battery fully charged (100%) according to the type of task usually performed.
• Check the energy (Wh) of the laptop battery. Read here.
• Apply formula:
• Average Laptop Power Consumption (W) = Laptop Battery Energy (Wh) / Time of use (h)
• Check stored energy (Wh) of the power bank. Read here.
• Depending on the type of power bank, calculate energy to work with the laptop and/or to recharge its battery (read here):
• Power bank with DC or USB-C PD port (read here):
• Useful energy = Power bank energy x 0.7225
• Power bank with AC port (read here)
• Useful energy = Power bank energy x 0.6141

Depending on the charging method of the laptop:

• With the laptop battery removed:
• Usage time (h) = Useful energy (Wh) / Average Laptop Power Consumption (W)
• Number of charges = Useful energy (Wh) / Laptop Battery Energy
• Usage time = No. of charges x Laptop Battery Energy (Wh) / Laptop Power Consumption (W)

### Test results of charging a laptop with a power bank

Next, we are going to see the theoretical and real results obtained by charging some laptops with a power bank:

• Model: Lenovo Z50-70
• Charger: 20V/2.25A (45W)
• Charging voltage: 20V
• Battery energy: 70Wh
• Charging port: DC Lenovo (square jack)
• Usual usage tasks: office automation with virtual machine (Virtual Box)
• Battery life 100%: 2h 45min = 2.75h
• Average laptop consumption: 70Wh /2.75 h = 25.5W
• Model: Omars 20000mAh USB-C PD 45W
• Battery capacity: [email protected] 72Wh
• USB-C PD port: 5V/3A, 9V/3A, 12V/3A, 15V/3A, 20V/2.25A (45W max)
• Charging voltages: 5V, 9V, 12V, 15V, 20V
• Cable: USB-C PD to DC Lenovo 20V
• We calculate the useful energy of the power bank to use the laptop and recharge its battery:
• Useful energy = Power bank energy x 0.7225 = 72Wh x 0.7225 = 52Wh

Time of use with the chosen tasks:

• Laptop battery removed:
• Theoretical data: Useful energy Power bank / Average laptop power consumption = 52 Wh / 25.5 W = 2h
• Actual data: 2h 50min
• Actual data:
• Laptop usage time with power bank: 1h 41min 35% of the battery recharged.
• Total usage time: 2h 33min
• Model: Acer Aspire E5-551-T2HE
• Charger: 19V/3.42A (65 W)
• Charging voltage: 19V
• Battery energy: 56Wh (5000mAh/11.1V) reduced to 45Wh
• Charging port: DC Lenovo (square jack)
• Usual usage tasks: office automation and web surfing
• Battery life 100%: 3.5h
• Average laptop consumption: 45Wh /3.5 h = 12.9W
• Model: Litionite Vulcan 20000mAh USB-C PD 65W
• Battery capacity: [email protected] 74Wh
• USB-C PD port: 5-20V (65W max)
• Charging voltages: 5- 20V (read this)
• Cable: USB-C PD to DC jack 5.5×2.1 20V
• Adapter: DC jack 5.5×2.1 to DC jack 5.5×1.7
• We calculate the useful energy of the power bank to use the laptop and recharge its battery:
• Useful energy = Power bank energy x 0.7225 = 74 Wh x 0.7225 = 53.5Wh

Time of use with the chosen tasks:

• Laptop battery removed:
• Theoretical data: Useful energy Power bank / Average laptop power consumption = 53.5 Wh / 12.9 W = 4.15h (4h 9min)
• Actual data: 4h 37min
• Theoretical data:
• Number of charges = Usable energy / Laptop battery energy = 53.5Wh/45Wh =1.19 charges.
• Usage time = No. of charges x Laptop battery energy (Wh) / Laptop power consumption (W) = 1.19 x 45 Wh / 12.9 W = 4.15 h (4h 9min)
• Number of charges = 1.42 charges
• Usage time = 4.95 h (4h 57min)
• Actual data:
• Laptop usage time with power bank: 1h 50min 82% of the battery recharged.
• Total usage time: 4h 41min
• Model: HP Stream 11 (11-d010nr)
• Charger: 19.5V/2.31A (45W)
• Charging voltage: 19.5V
• Battery energy: 37 Wh
• Charging port: DC HP 4.5/3.0 mm (blue round jack)
• Usual usage tasks: watch Netflix with maximum brightness on HD resolution screen (720p).
• Battery life 100%: 6h 29min = 6,48h
• Average laptop consumption: 37Wh /6.48 h = 5.71W
• Model: Baseus 20000mAh USB-C PD 45W
• Battery capacity: [email protected] (76Wh)
• USB-C PD port: 5V/3A, 9V/3A, 12V/3A, 15V/3A, 20V/2,25A (45W max)
• Charging voltages: 5V, 9V, 12V, 15, and 20V (read this)
• Cable:USB-C PD a DC HP 20V
• We calculate the useful energy of the power bank to use the laptop and recharge its battery:
• Useful energy = Power bank energy x 0.7225 = 76 Wh x 0.7225 = 54.91 Wh

Time of use with the chosen tasks:

• Recharging battery with laptop off:
• Theoretical data:
• Number of charges = Usable energy / Laptop battery energy = 54.91 Wh/37 Wh =1.5 charges.
• Usage time = No. of charges x Laptop battery energy (Wh) / Laptop power consumption (W) = 1.5 x 37 Wh / 5.71 W = 9.72 h (9h 43min)
• Number of charges = 1.75 charges
• Usage time = 8.98h (8h 58min)
• Actual data:
• Laptop usage time with power bank: 1h 45min 85% of the battery recharged.
• Total usage time: 8h 15min

## Best power banks for laptops (May 2023)

Once you are familiar with the features of a laptop power bank, we present the best models available on the market taking into account the different types of output ports: DC, AC, and USB-C PD.

Notice: Remember that if your laptop has a DC charging port and you choose to buy a power bank with a USB-C PD port you need to use a USB-C PD to DC adapter.

## Charges the widest range of USB-C laptops, as well as mobile devices.

When you need power on the go, the Dell Notebook Power Bank Plus. USB-C, 65Wh, can charge the widest range of laptops and devices with a high 65W power delivery. Whether you need to charge devices with voltage profiles of 5V, 9V, 15V or 20V, the Power Bank Plus has you covered.

## Improve productivity with a large battery capacity

The large, 65Wh, 6-cell power capacity keeps your laptop and mobile devices up and running longer and charges laptops requiring up to 65W of power delivery. for uninterrupted productivity while you’re out and about. Get an additional run time of up to 16 hours on your Dell XPS 9370.

## Dual device charging with data read and write capability in a slim design

Plug your smartphone into the secondary USB-A port to charge it alongside your USB-C laptop. This extra USB-A port offers viewing and editing of content from your smartphone or flash drive, without taking up another USB-A port on your laptop. Plus, the cables coil easily around the slim profile and rounded edges of the power bank to fit neatly in your bag for tidy storage.

Dell Notebook Power Bank Plus – USB-C, 65Wh requires a USB-C power adapter (sold separately) to charge. Select Dell laptops (Latitude 5×90/7×90) may not ship with a USB-C power adapter.

## What’s in the box

Dell Notebook Power Bank Plus (18,000 mAh)2x Dell Notebook Charging Cables

• Dell power adapter is required for charging the Notebook Power Bank Plus (not included in the box)
• It can be charged using your Dell power adaptor supplied with your compatible Dell system if it has a USB-C connector

This product is compatible with the following systems:

• Chromebook 11 3000 3110
• Chromebook 11 3000 3110 2-in-1
• Chromebook 11 3100
• Chromebook 11 3100 2-In-1
• Chromebook 11 5190
• Chromebook 11 5190 2-In-1
• Chromebook 14 3400
• Inspiron 13 5000 (5310)
• Inspiron 14 7000 (7420) 2-in-1
• Inspiron 14 7000 (7490)
• Inspiron 16 7000 (7620) 2-in-1
• Inspiron Chromebook 14 7486 2-in-1
• Latitude 3120 2-in-1
• Latitude 3310 2-in-1
• Latitude 3320
• Latitude 3330
• Latitude 3390 2-in-1
• Latitude 3400
• Latitude 3410
• Latitude 3420
• Latitude 3490
• Latitude 3500
• Latitude 3510
• Latitude 3520
• Latitude 3590
• Latitude 5285 2-in-1
• Latitude 5289 2-in-1
• Latitude 5290
• Latitude 5290 2-in-1
• Latitude 5300
• Latitude 5300 2-In-1
• Latitude 5300 2-in-1 Chrome
• Latitude 5310
• Latitude 5310 2-in-1
• Latitude 5320 2-in-1
• Latitude 5330
• Latitude 5400
• Latitude 5400 Chrome
• Latitude 5401
• Latitude 5410
• Latitude 5411
• Latitude 5420
• Latitude 5421
• Latitude 5430
• Latitude 5490
• Latitude 5495
• Latitude 5500
• Latitude 5501
• Latitude 5510
• Latitude 5511
• Latitude 5520
• Latitude 5521
• Latitude 5530
• Latitude 5590
• Latitude 7200 2-In-1
• Latitude 7210 2-in-1
• Latitude 7285 2-in-1
• Latitude 7290
• Latitude 7300
• Latitude 7310
• Latitude 7320
• Latitude 7320 Detachable
• Latitude 7330
• Latitude 7389 2-in-1
• Latitude 7390
• Latitude 7390 2-in-1
• Latitude 7400 2-In-1
• Latitude 7410 2-in-1
• Latitude 7420
• Latitude 7430
• Latitude 7490
• Latitude 7520
• Latitude 7530
• Latitude 9330
• Latitude 9410 2-in-1
• Latitude 9420 2-in-1
• Latitude 9430
• Latitude 9510
• Latitude 9520 2-in-1
• Latitude Chromebook 14 7410 2-in-1
• Precision 3540
• Precision 3550
• Precision 3551
• Precision 3560
• Precision 3561
• Vostro 13 5000 (5310)
• Vostro 13 5000 (5320)
• XPS 13 (7390)
• XPS 13 (7390) 2-in-1
• XPS 13 (9300)
• XPS 13 (9305)
• XPS 13 (9310)
• XPS 13 (9310) 2-in-1
• XPS 13 (9315)
• XPS 13 (9315) 2-in-1
• XPS 13 (9320)
• XPS 13 (9365) 2-in-1
• XPS 13 (9370)
• XPS 13 (9380)
• XPS 15 (9500)
• XPS 15 (9570)
• XPS 17 (9700)

## DIY Laptop PowerBank

In this project I will show you how to create a Laptop PowerBank. It mainly consists of a Li-Ion battery pack and one buck and boost converter. This way the PowerBank can get charged up through the Laptop power supply and aftewards charge up the Laptop directly to give it an additional run time of 3 hours. Let’s get started!

## Step 1: Watch the Video!

The video gives you all the information for a basic overview of the project. During the next steps, I will present you more detailed information.

## Step 2: Order Your Components!

Here you can find a parts list with example seller (affiliate links):

## Step 3: 3D Print the Enclosure!

Here you can find the 123D files as well as the.stl files for my enclosure. But make sure that you also print the corrected lid file which is 5mm longer.

## Step 4: Do the Wiring!

Here you can find the wiring schematic along with tons of reference pictures of my laptop powerbank. Feel free to use them to create your own powerbank.

## Step 5: Success!

You did it! You just created your own Laptop PowerBank!

Feel free to check out my YouTube channel for more awesome projects:

You can also follow me on. and Google for news about upcoming projects and behind the scenes information:

## Be the First to Share

Did you make this project? Share it with us!

## Комментарии и мнения владельцев

According to links the LiFePo4 BMS is used with Li-Ion batteries. Those are different chemistries and have different working voltage. For discharge and charge. I do not understand how is it can even work. It should already give problems at first discharge.

This is an awesome project and a must doing it.

Hey I stumbled in this video am so amazed I will like to make one, but how do I charge the battery when it run down.Thanks

So amazing, that’s why i regarded you l as my mentor in electronic eng. I will give it try and share the experience i get. Thanks

The enclosure looks fantastic. Really clean 🙂

i don’t think that it matters. the laptop will draw the required amount of current. all you need to make sure is that the convertor you’re using supports the current draw of the laptop.He only limited the current on the batteries as they have a current limit recommendation and exceeding that can lead to the battery degrading faster than normal or possibly causing fires.

i know this is a late reply but hope it answered your question and helps anyone else out.

EBay links aren’t really helpful as once products are sold the link changes. Perhaps a link to an online retailer with a suggestion to check eBay.

can somebody send me the files seperate

can u up load each part separate because i can not print all at once

Since I am not a EE, I am looking for one who can create a PCB for my powerbank with nand chip on it for prototyping. I know I can order such pcb’s from China for powerbanks but I need an extra function on my device for storage. the measurement of such pcb would be around 150mm/200mm by 1000mm (see pic as a format), double or triple layers. I have a small budget can pay you but let me know your rate.

a better solution would be to increase the laptop battery

That’s a great project. I’m happy to see you included all the safety measures in it.I had the same problem of less working time out of my old laptop battery. So I got a new battery and now if the battery dies, I can hibernate the laptop(it auto hibernate when battery level drops), switch out the battery and continue working. Much simpler method but yours is much cooler 🙂

### This Power Bank Can Charge Your Laptop | Best Power Banks For Laptops | The Intellectual Monk | 2022

This is amazingly, excellent !

This is amazing! Any workaround to save costs on the BMS?

Have a look on AliExpress, you can save a few bucks at least. I did a quick search for an 8s 24v BMS, and saw a few listed over there.

## MOJOGEAR ULTRA 26,800 mAh 100W Laptop Power Bank

Ordered now, delivered on Wednesday

1046 in stock (can be backordered)

• Free shipping in NL cheap worldwide shipping
• Fast delivery
• Expert advice via phone, email Whatsapp
• Customer rating: 4.87 stars
• Charge your laptop/MacBook 1 to 2 times. This super powerful 26,800 mAh laptop power bank is ideal for charging your laptop on the road or on vacation (can be taken on the plane).
• 100W power. Fast charging via USB Power Delivery (for laptop, MacBook and iPhone) up to 100W. Also supports Quickcharge 3.0 (including Samsung, LG Sony).
• With USB-C to USB-C cable. Charging the power bank itself and your laptop can be done with the included USB-C to USB-C cable.
• Solid metal. The housing is made of sturdy aluminum and can take a beating. Due to the large capacity, the power bank is somewhat larger and heavier (640 grams).
• Charge 3 devices at the same time. With the two USB ports, plus the USB-C port, you can easily charge three devices at the same time.

## Description

Are you often on the road, or do you work in locations where you do not always have electricity available? No problem with this MOJOGEAR ULTRA 100W laptop Powerbank! Thanks to the large capacity of 26800 mAh, you can fully charge your laptop or MacBook at least once. Charge your laptop superfast via USB-C Power Delivery. Also suitable for smartphones, tablets and other devices.

The MOJOGEAR ULTRA is our largest and most powerful power bank. Due to the large battery capacity, this power bank is slightly heavier (640 grams). Do you prefer a power bank that fits easily in your or handbag? Then choose one of our 10,000 mAh power banks, which are smaller and lighter.

### 100 Watt Laptop power bank

The MOJOGEAR ULTRA is specially designed for charging laptops and MacBooks via USB-C. With 26,800 mAh capacity and 100W power, the laptop power bank can charge almost all laptops at least 1 time at maximum speed. See below an overview of a number of popular laptop models.

 Model Capacity (Wh) Number of Charges 13-inch MacBook Pro (2021) 58.2 Wh 1 time 14-inch MacBook Pro (2021) 69.6 Wh 1 time MacBook Air (M1, 2020) 49.9 Wh 1.5 times MacBook Air (2017) 54 Wh 1.5 times HP Pavilion 15 41 Wh 2 times HP Specter x360 58 Wh 1.5 times Lenovo Legion 7 78 Wh 1 time Acer Swift 3 56 Wh 1.5 times iPad Pro 12.9″ (2021) 40.3 Wh 2 times iPad Pro 11″ (2021) 28.65Wh 2.5 times

The power bank works with all laptops that support USB-C charging. The intelligent chip in the power bank ensures that your laptop automatically charges at the optimum speed.

In addition to laptops, almost all devices with a USB or USB-C connection can be charged by the power bank. Think, for example, of smartphones (iPhone, Samsung Galaxy, Xiaomi, OnePlus, etc.), tablets (iPad, Samsung Galaxy Tab, Lenovo Tab), digital cameras, smartwatches and E-readers.

### Charge three devices at once.

With 1 USB-C and 2 standard USB connections, you can easily charge up to three devices at the same time. The USB ports support QuickCharge 3.0 and the USB-C port supports USB-C Power Delivery, enabling fast charging for almost all smartphones, tablets, laptops and other devices. The LED indicator lights show how much power you have left. Due to the sturdy metal housing, the power bank can take a beating.

For most power banks, you cannot use the full power (W) when charging multiple devices at the same time. The MOJOGEAR ULTRA is an exception. With a maximum output power of 118W, you can quickly charge your laptop at 100W via USB Power Delivery while also charging two other devices.

Please note: we include a USB-C to USB-C cable (30 cm). It is intended to charge the power bank via the USB-C port. You can also charge devices with a USB-C connection with the cable. Are you looking for a longer USB-C cable or Apple Lightning cable (for iPhone)? View our range of cables.

### Take with you on the plane

Do you want to take this power bank with you on the plane? That is not a problem at all! The MOJOGEAR ULTRA power bank has a capacity of 26,800 mAh (96.5 Wh) and is therefore suitable to take with you on an airplane. Most airlines allow you to take two power banks with a total capacity of 100 Wh in your hand luggage.

### MOJOGEAR

MOJOGEAR is a Dutch brand specialized in accessories for smartphones. We supply high-quality products for a reasonable price. We work closely with our factory, where our products are produced under good working conditions.

### Specifications laptop power bank 26800 mah

• Capacity 26,800 mAh
• Package contents Power bank, USB-C to USB-C cable (30 cm, USB 2.0), manual
• Connections 2 USB ports (output), 1 USB-C port (in/out)
• Dimensions power bank 19.0 x 8.7 x 2.4 cm
• Weight power bank 640 grams
• Number of times laptop recharge 1 to 2 times (depending on your laptop/MacBook)
• Number of times smartphone recharge 5 to 10 times (depending on your smartphone)
• Suitable for Laptop, MacBook, smartphone, tablet, e-reader, actioncam, wireless earphones
• Charging speed up to 5A/20V
• Maximum power 100W
• Fast charging 1 USB port supports QuickCharge 3.0 (for Samsung, LG, Sony, Xiaomi, HTC and Nokia, among others) and the USB-C port supports USB Power Delivery (for Apple)
• LED indicator 4 status lights
• Color black Housing
• material Plastic
• Manual Dutch, English
• Warranty 2 years
• Safety Tested and protected against overcharging

## Notebook power bank

On weekdays ordered before 21:00, we ship the same day. Depending on where you live, the package will be delivered within 5. 10 working days (after you receive the shipping confirmation email).

## year Warranty

Register your Xtorm Product immediately after purchase and receive an extra year warranty on your Xtorm product.

### Find anything you need

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## Laptop Power Banks

The XB4 Titan Power Bank seamlessly combines its iconic design with class-leading specifications, sustainable materials, and innovative features. It’s the perfect Power Bank to fast-charge your Ultrabook, tablet and smartphone. Thanks to the built-in cable you’re always ready to charge on-the-go! The ultimate laptop Power BankThe Titan packs 3 powerful USB-C PD outputs, with a combined total output of 90W. The 60W USB-C PD port is optimised to charge Ultrabooks and other lightweight laptops, it fully charges them in only 1,5 hours. The other USB-C PD outputs are highly suitable to charge your smartphone or tablet. Extra fast rechargingThanks to the 60W USB-C PD input, the Power Bank itself can be fully recharged and be ready to use in under 2 hours. It even supports pass-through charging, so you can charge other devices even while the Power Bank is being recharged!Moving towards a sustainable futureIn a push to move towards a more sustainable future, we’ve incorporated the use of recycled plastic into the body of our Power Bank. Even our packaging is made from recycled materials. Our products are built to last. This way we fight the replacement market. A design that feels good Design goes hand in hand with user-experience. This is why we pay special attention to details; like a smooth soft-touch finish, a carefully integrated magnetic USB-C cable, as well as the LED battery display that only appears when needed. Re-imagining the battery displayThe LED battery display in the Titan perfectly blends into the overall design of the Power Bank. Its retro inspired pixelated design only appears when needed, showing the actual battery percentage and charging status. When turned off, the display is totally invisible – making the design of the Power Bank stand out even more, remaining clean minimalistic.

The XB4 Titan Power Bank seamlessly combines its iconic design with class-leading specifications, sustainable materials, and innovative features.It’s the perfect Power Bank to fast-charge your MacBook, tablet and smartphone. Thanks to the built-in cable you’re always ready to charge on-the-go! The ultimate laptop Power BankThe Titan packs 4 powerful USB-C PD outputs, with a combined total output of 150W. The 140W USB-C PD port is optimised to charge MacBooks or other powerful laptops, it fully charges them in only 1.5 hour! The other USB-C PD outputs are highly recommended for charging your smartphone or tablet.Extra fast rechargingThanks to the 100W USB-C PD input, the Power Bank itself can be fully recharged and be ready to use in under 1,5 hours. It even supports pass-through charging, so you can charge other devices even while the Power Bank is being recharged!Moving towards a sustainable futureIn a push to move towards a more sustainable future, we’ve incorporated the use of recycled plastic into the body of our Power Bank. Even our packaging is made from recycled materials. Our products are built to last. This way we fight the replacement market.A design that feels goodDesign goes hand in hand with user-experience. This is why we pay special attention to details; like a smooth soft-touch finish, a carefully integrated magnetic USB-C cable, as well as the LED battery display that only appears when needed.Re-imagining the battery displayThe LED battery display in the Titan perfectly blends into the overall design of the Power Bank. Its retro inspired pixelated design only appears when needed, showing the actual battery percentage and charging status. When turned off, the display is totally invisible – making the design of the Power Bank stand out even more, remaining clean minimalistic.

Ever wished you had access to an AC socket even when you aren’t at home? With the Xtorm Portable Power Socket 70 you have access to a powerful 70W AC socket, anywhere you are. It’s been designed to be allowed on airplanes, so you can easily take this power bank all over the world!Versatile port selection – Always have the power you needThe Power Station not only features a 70W AC output, but also a regular USB output, as well as 30W USB-C PD in/output. This means you can charge almost anything, wherever you go. The perfect power bank for all of your adventures.Designed for travelThe power bank is designed for travel and adventure. It features a 360⁰ shock-absorbing rugged exterior, and even the AC socket is protected against dirt and dust thanks to a specially designed cover.Extreme power. anywhereIt doesn’t matter whether you’re going camping, road tripping, or simply just traveling anywhere remote – these days you need enough power to fuel all your devices, and the Portable Power Socket it the perfect way to do it. Combine it with a solar panel and you’re able to go fully off grid, without having to give up the devices you can’t live without.

Portable Power Station 300W Solar Panel 100W