A power bank big enough for your laptop

Dual 140W USB C ports, up to 310W of total output, and a 20,000mAh battery with a color display. Here is what it can do, how it travels, and what to check before you buy.

Shop the 310W power bank

Most power banks are built for phones. Plug in a laptop and they give up.

If you work from cafes, airports, or the back of a car, you need a power bank that can keep up with a laptop, and still has something left for your phone.

The 310W 20,000mAh Power Bank has two USB C ports rated up to 140W each, plus a USB A port, in a body that fits in a laptop bag.

What makes it different

Laptop level power: Each USB C port supports up to 140W, according to the supplier, and the power bank has up to 310W of total output across its ports, so it can power laptops, tablets, and phones.
Three ports at once: Two USB C ports and one USB A port let you charge a laptop, a phone, and a smaller device at the same time.
20,000mAh capacity: The supplier states it can charge an iPhone 17 Pro Max about 2.1 times, an 11 inch iPad Pro about 1.3 times, and a 16 inch MacBook Pro about 1.2 times.
Fast recharging: Both USB C ports accept up to 140W input. The supplier states that a single port can fully recharge the power bank in under an hour, and that using both ports reaches up to 180W.
A color display: The display shows the remaining battery, the input and output power, and the status of each port, so you always know what is happening.
Built in protection: Temperature monitoring and multiple layers of protection are built in to help keep high power charging stable.

Who it is for

Remote workers who move between cafes, trains, and airports
Travelers who need to keep a laptop and a phone charged
Students who work away from a desk
Anyone who has run a laptop battery down at the worst time

Get started in 4 steps

Charge it firstUse the included USB C cable and a compatible USB C charger to fill the power bank before your trip.
Connect your laptopPlug your laptop into a USB C port with a cable rated for its power needs.
Add your phoneUse the other USB C port or the USB A port for a phone or smaller device.
Check the displayWatch the remaining battery and the power for each port on the screen.

Good to know before you buy

The supplier lists the battery at 74Wh, which is under the 100Wh limit that most airlines allow for carry on bags. Power banks must go in your carry on, not in checked luggage, and airline rules can change, so check yours before you fly. Actual charging speed depends on your device and your cable, and the highest speeds need a compatible charger. A wall charger is not listed in the box.