There’s nothing worse than trying to get work done offsite and realizing your laptop is nearly dead. OK, there are plenty of worse things, but running out of battery when you’re not near an outlet can be seriously inconvenient. Laptop power banks are similar to other rechargeable banks you may have used to top off a smartphone, but with larger capacities and more ports. There’s no standard rating to qualify a battery as a laptop-grade brick, but here we only considered versions with at least a 20,000mAh capacity so they can deliver enough charge but under 27,000mAh (99Wh) so the TSA will let you fly with them in your carry-on luggage. After testing a slew of popular options over the past couple of years, we think these are the best laptop power banks you can buy.
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Best laptop power banks for 2025
Capacity: 27,000 mAh, 99.9 Wh | Ports: One USB-C in/out, two USB-A out and three wireless pads | Cable included: USB-C to USB-C and wall adapter | Charge time iPhone 15: 5 to 100% in 2h 56m (wireless) 5 – 100% 2h 22m (wired) | Remaining charge after iPhone: ~ 81% | Charge time Galaxy S23 Ultra: 5 to 100% in 1h 20m | Remaining charge after S23 Ultra: ~ 77% | Charge time iPad Air: 5 to 100% in 1h 55m | Remaining charge after iPad: ~ 64% | Charge time MacBook Pro: 10% to 89% in 1h 18m
Traveling is one of the top reasons people need to use a portable laptop charger — planes, trains, buses and airports aren’t exactly the easiest places to find a power source. Lion Energy’s Eclipse Mag battery pack has a big 27,000 capacity, which is enough to power a laptop through a couple days of use. I also like how its three wireless charging pads cut down on cable chaos, letting you charge a Qi-enabled phone, earbuds case and Apple Watch at the same time.
You certainly could charge all three of those accessories and a laptop at one time, but as with all batteries, that increased drain will quickly empty it and your charge times will slow down quite a bit. From what I’ve seen, the unit works best as an as-needed power supply when you’re out and about, then, after a recharge, it can moonlight as a three-in-one wireless charger in your hotel room. You can even rely on the pass-through charging capabilities to power up the battery while using the wireless pads, making it a sort of travel-ready multi-device charger.
At two pounds, no one would call this light, but the angled corners and narrow design make it feel more…