If you routinely use your laptop in a coffee shop, on an airplane, or some other location where wall outlets are hard to come by, you should invest in one of the power bank for laptop listed in this guide. When your laptop’s battery is running low and there isn’t an outlet nearby, a power bank comes in handy. So you can work on long flights or train rides, it will keep your laptop operating for hours.
A high-capacity power bank for laptop isn’t just handy; it’s also useful in an emergency. Prepare for wildfires, flooding, and other emergencies by including one of these in your bug-out bag. In the event of an unexpected surgery, or other medical emergencies, have one in your hospital go-bag to keep electronics charged.
ZMI PowerPack 20K
While it can charge a wide range of laptops, the ZMI PowerPack 20000 is compact enough to fit in any backpack or laptop bag, as well as most handbags, so you can keep it with you at all times. It also has a nice appearance. In addition, it has a higher capacity (mAh) per dollar, thus it’s a better value than the majority of the other power banks we evaluated. In terms of power, it’s fantastic for Chromebooks and other smaller laptops like the 13-inch MacBook with its 40 W maximum output, but if you’ve got a larger laptop like the 16-inch MacBook Pro, we recommend our 60 W option instead.
When it comes to using the PowerPack 20000, anything is simple and intuitive. Charging is as simple as plugging it into a USB-C port and then using it to charge your other gadgets. In addition to the USB-C port, it has hub capability that lets you add USB-A ports so that you may use the USB-C connection to power and transfer data between your laptop and other devices. This is useful if you want to connect your laptop to other devices, such as a smartphone or a portable SSD. Simply push the power button twice to activate this feature, then hold it until a little green light appears (distinct from the power indication lights).
During our tests, we found the PowerPack 20000 to have an output of 40 watts, which is more than enough to recharge most computers. If you plan on using a powerful laptop like the 16-inch MacBook Pro for extended periods of time, a power bank with 60-watt or higher output (like ZMI PowerPack 20K Pro) is the preferable option. This device charged a Dell XPS 13 laptop from 0% to 50% in an hour during our tests.
The PowerPack 20000 recharges itself at top speed, as seen by our measurement of a maximum input of 60 watts. A 45-watt USB-C PD charger will take roughly four hours to fully recharge the device, whereas a typical 10-watt USB-A wall charger will take about nine hours.
Most of the power packs we examined have two USB-A ports, including this ZMI one. In terms of wattage, the two ports produced 12.3 watts and 13.4 watts respectively. In other words, even the greatest USB-A wall chargers can’t keep up with charging smartphones and wireless headphones as quickly as a 10-watt charger like Apple’s standard charging brick. Testing has shown that simultaneously powering a 13-inch MacBook Pro and two smaller devices has no major impact on the speed of charging either.
PowerPack 20000 should be able to fully charge a 13-inch laptop, but this depends on your laptop’s battery size. TSA regulations allow you to pack a carry-on with a battery pack with a capacity of 20,000 mAh (or around 74 watt-hours).
The PowerPack 20000 has a sleek metallic dark blue design and is small and portable. It’s easy to put into a purse because to the smooth surface and rounded edges. It’s smaller and lighter than an iPad Mini, weighing in at 14.2 ounces. It’s a nice touch that the power bank has four little battery-status lights (next to the power button) that show how much charge is left in the battery.
With this power bank, you get a USB-C cable, a 2-in-1 cable, and a plush carrying pouch to protect the ports from dust and moisture while you’re traveling. There’s an 18-month warranty from ZMI on the PowerPack 20000, so you can test it out on innumerable aircraft, coffee shops, and conference rooms.
ZMI USB PD Backup Battery & Hub for MacBook Pro 2016 & newer/MacBook Air 2018/Nintendo Switch/iPhone 12 Fast Charge External Battery Pack Portable Charger Powerbank for iPhone/iPad/Samsung
ZMI PowerPack 20K Pro
However, the main difference between it and our top pick is that it has a maximum power output of 60 watts, while the PowerPack 20000 only has an output of 40 watts. This makes it a better choice for those who have a MacBook Pro or other similarly powerful laptop. While it lacks the PowerPack 20000’s output, it is same in that it also serves as a hub, has two high amperage USB-A output ports, and a rapid USB-C power delivery input/output port. With the PowerPack 20K Pro, you get the same ultra-compact size and weight as the PowerPack 20000, but with the added benefit of being rechargeable in as little as four hours with the correct wall charger. In addition, ZMI offers an 18-month warranty on this item.
While most laptop users will be happy with our top pick’s performance, owners of the 13-inch MacBook Pro and its 14- and 16-inch siblings will appreciate the 20K Pro’s increased output. However, a more powerful charger does not necessitate owning a MacBook Pro. This is the ideal option if you have a computer that consumes more than 40 watts and want to charge your laptop as quickly as possible—or while it’s running many programs.
As well as a charging cable (A-to-C) and a protective carrying pouch, this power bank includes two USB-C charging cables. Because it lacks a USB wall charger like its dark-blue sibling, you’ll have to purchase one or utilize an existing charger from your phone or laptop.
The PowerPack 20K Pro, like the ZMI PowerPack 20000, has a smaller capacity than some of the other options we looked at. Model QB826G of the ZMI PowerPack No. 20 has a capacity rating of over 20,000 mAh, as does the discontinued Anker PowerCore+ 19000 PD, RAVPower RP-PB059, and Zendure X69. Although the ZMI models have a smaller capacity, we believe the sleek design, narrow profile, and high input/output wattage make up for the shortcoming.
The PowerPack 20K Pro costs more than the PowerPack 20000 at the time of this writing. Unless you really require the additional power of the PowerPack 20K Pro, we believe it’s best to save a few dollars and go with our top pick.