If you're looking for a battery bank to charge your laptop, you're in the right place! We've tested dozens of power banks for laptops, including newer models with a capacity as high as 30,000 mAh, something unheard of a decade ago.
As we venture into this new world of portable charging, keep a few things in mind. Just because a battery bank has an advertised mAh doesn't mean you'll get that number. You'll lose some energy from heat, charging cables, and other factors. Look for a rated energy calculation to better understand how much power you're getting!
Often, a bigger size means more capacity. That said, it's important to remember that you have to pack this thing into a daypack, sling, or travel backpack, and space is at a premium. It's best to find a battery bank that balances power and size!
Last but certainly not least, choose a battery bank that works with the cables you already own. There's no point buying all new cords just to get a new battery bank. We're not discouraging you from updating everything to USB-C, but there's bound to be a battery bank that meets your needs if you haven't yet!
If, after reviewing all the products below, you still can't decide on a battery bank, we've compiled an FAQ section to help you decide.
Let's dive in!
Ugreen Nexode Power Bank 20000mAh 130W
Best value
The UGREEN Nexode Power Bank 20000mAh 130W portable charger is big and beefy, but for good reason. Its 20,000 mAh capacity gives you adequate charging for most devices. It has two USB-C ports and an additional USB-A port, which we typically only use as a backup. The max output from the USB-C port is 100 watts, which is more than enough juice for most laptops, though computers with more power might charge more slowly or require something more powerful. Coming in at under $100, the price-to-power ratio here is fantastic.
Apart from getting the job done under the hood, there are some extra features. The battery bank has a large screen that indicates how much battery you have left and the status of each port. There's a time indicator, too, so you know how much longer you'll be able to charge at the same rate, which is easier to quantify while working than a percentage. Plus, if you need more time to fully charge your laptop, you can remove a device, like your headphones, to ensure you have enough juice to finish your day's work.
Why We Like It- It's budget-friendly for all the features this device has
- The screen indicates the status of each port, so you know what's charging
- It's pretty large, making it hard to fit into moderately sized tech pouches
- The screen picks up smudges very easily
Anker 737 Power Bank (PowerCore 24K)
If you thought 20,000 mAh battery banks were top-tier, think again. Anker took things to a new level with the Anker 737 Power Bank, which has 24,000 mAh. It makes it easy to charge all your devices at once without worrying about running out of juice. It has two USB-C ports and one USB-A port to charge with different cables. The USB-C port maxes at 140 watts, adequately charging almost all laptop computers.
The device has a screen, like those offered by UGREEN, to indicate how much of a charge you have left. In addition to a percentage, the battery bank lists the status of each port, which is handy for planning how much each device is using, and there's a time remaining status, too. The screen on the 737 is smaller than on some similar battery banks, which we dig because there isn't as much room for it to crack, though the lettering is slightly smaller than we're used to.
Why We Like It- With 24,000 mAh, you can charge multiple devices from 0 to 100%
- The screen is smaller, which means there's less surface area to scratch or crack
- The battery bank is quite large, so it won't fit into your pocket
- The USB-A port feels dated
Ugreen 100W 20000mAh Power Bank
Best budget
When it comes to bang for your buck, it's hard to beat the UGREEN 20000mAh 100W Power Bank. Despite lacking some of the extras of other battery banks on this list, like extraordinarily high mAh and a higher max output, this device is often on sale for $50 or less, making it one of the best budget-friendly options on the market. With a 20,000 mAh battery, you can still charge most devices to completion, and your laptop will get adequate power if work takes longer than anticipated. It maxes out at 100 watts, which will work for most devices and smaller computers.
Like many of the battery banks on this list, the UGREEN has two USB-C ports and a USB-A port. In testing, we used the USB-C ports more often, as they're more versatile, but it's nice having an extra USB-A port if you are in a pinch and need to charge another device, or one of your cables breaks and you have to buy one locally. Sometimes, USB-A cables are all you can find. That said, the USB-A port isn't functional if you've already upgraded to all USB-C cables. Still, it doesn't get in your way if you aren't using it, so we can't scoff at it too much.
Why We Like It- The price is excellent for the features offered by the battery bank
- It charges up to 100 watts, which will work for most computers
- It doesn't have as many features, like a large display screen
- The USB-A won't be helpful for some travelers
Anker Prime 27,650mAh Power Bank (250W)
Best splurge
When this guide was first released, the Anker Prime 27,650mAh Power Bank was the most expensive battery bank on the list. For all that dough, you get a lot of extra features, and we're here for it. The 27,650 mAh capacity is one of the largest we've seen from a reputable brand, and you'll be able to charge your computer, phone, and headphones without worrying about running out of juice. In addition to its high capacity, it maxes out at 140 watts of power on each USB-C port when charging one device, which can power almost anything you'd bring with you on your next trip. There are 2 USB-C ports and a USB-A port so you can charge up to three devices simultaneously.
The device has a large front screen that indicates how much battery you have left, what each port is doing, and an estimate of how much time you have left based on what you're charging at that moment. This makes it easier to plan your day (and what to charge when), because you know how much longer you can work before you are forced to start playing instead.
The battery bank is quite large and heavy, making it challenging to find a spot for it while on the go, but it'll fit inside a large sling, daypack, or travel backpack without issue.
Why We Like It- It has a massive capacity, so you don't have to worry about overcharging
- The USB-C port maxes out at 140 watts for fast charging
- It's pretty large, making it challenging to pack in small bags or a tech pouch
- The screen gets smudged up easily
INIU B64 140W 27,000mAh Power Bank
Typically, large-capacity battery banks are divided into two size groups. Those around 20,000 mAh are generally flat and long, and those above that level are wider and shaped more like bricks than the mortar you'd find between them. The INIU B64 140W 27,000mAh Power Bank has a massive capacity, but comes in the shape we're used to seeing from smaller battery banks, which is refreshing. It doesn't have all the extra features we're used to seeing from the brick-style models, but not everyone needs those. The USB-C port maxes out at 140 watts, too, so you can charge almost all laptops with it. There are two USB-C ports and a single USB-A one, too, which feels dated, but is manageable if you're prepared.
At the time of writing, the device is on sale for $70, which seems to be the norm. It offers excellent bang for your buck regarding capacity, output, size, and price. The screen on the device is handy, as it displays some useful information about how much battery life is left, but it isn't as detailed as other devices we've gone over on this list. Still, we can get over the lack of extras for the price!
Why We Like It- It has a flat design, making it easy to stow inside your pack
- It has a massive capacity and powerful output, making it a versatile device
- There isn't as much detail on the screen compared to other devices on this list
- The USB-A port feels dated
Others We Considered
We like the price of the Romoss PEA30 30000 mAh Power Bank, but with two USB-A ports, it feels dated and doesn’t have the output we’d want from a dedicated laptop battery bank. The Anker 25,000 mAh Laptop Power Bank is also a stellar choice, but we felt that other Anker products were better suited for travel.
Why You Should Trust Us
Since we started reviewing travel gear in 2017, battery banks have come a long way. From 3,000 and 5,000 mAh models that would only last a year or two to 30,000+ mAh battery banks you can fit into your pocket, we’ve been there every step of the way, seeing which battery banks fit into the best and most popular travel gear on the planet.
How We Tested It
Test 1:mAh, or milliampere-hour, measures the electrical capacity of a battery bank. We’ll use the battery’s listed capacity to determine how much juice each device will give you and what that means for your laptop, phone, and other devices.
Test 2:Capacity is great, but how you access that is even more important. In 2025, most battery banks will have at least one USB-C port, but we prefer those with more USB-C options or ones that exclusively have USB-C. Either way, we’ll review the ports of every battery bank on this list.
Test 3:Output matters when charging a laptop. If you can’t supply the computer with enough watts, it’ll charge slowly or not at all. We’ll review this for each battery bank to ensure you get one that works with your laptop.
How many mAh does it take to charge a laptop?
mAh, or milliampere-hour, doesn’t affect whether a battery bank can charge your laptop, but it’ll affect how much power it gives you. Depending on the brand and build of your laptop, your battery is likely between 2,000 and 6,000 mAh, meaning that a battery bank with a rated energy that exceeds that will charge the device one full time. If you’re using the computer while charging it, you won’t see the battery indicator fill up completely, because you’re burning energy as you use the computer.
Output, typically measured in watts, is arguably more important than capacity. Yes, you need a high-capacity battery bank to charge your laptop, but if the wattage is too low, your computer will still die while you’re using it. For example, a MacBook Air might charge at 30 watts, but some newer MacBook Pros with the Max Chip charge at 140 watts. If you have a battery bank that outputs 30 watts, the MacBook Air will be fine, but the MacBook Pro will starve.
What’s the best capacity for a laptop power bank?
This depends on your computer and how much you plan to use the laptop while away from a plug. If you want to take this battery bank camping, go with something closer to 30,000 mAh. If you get it for emergencies or use it to charge other, smaller devices more regularly, something closer to 20,000 will work fine.
A good way to judge if you already have a standard battery bank is to use that as an indicator of how you will use a new one just for your computer. You probably want to get a large capacity if you’re constantly running your smaller model down. If you rarely have to charge up, you’ll likely be satisfied with something smaller.
Can I travel with a laptop power bank?
Yes and no. Is that helpful? Some battery banks can fly, others can’t. These rules change often, but at the time of writing, you can take most battery banks on a flight if they’re in your carry on or personal item bag. Batteries pose a fire safety risk, making stowing them in your checked bag dangerous. Those brought in your carry on can’t exceed 160 watt-hours (multiply the battery’s voltage by its amp-hour capacity). If you don’t want to do the math, just look for a certified TSA-approved product!
So, there you have it! Some of the best laptop power banks on the market today. Enjoy the charge!