- Can I bring a power bank on a plane?
- Yes, in your carry-on only. Lithium batteries are not allowed in checked luggage. Most airlines allow banks up to 100Wh without approval and larger ones up to 160Wh with airline permission. The watt-hour rating is printed on the bank; check your carrier's policy before flying.
- How many mAh do I need for a week of travel?
- For a phone, a 10,000 mAh bank gives a couple of full charges and is easy to refill nightly, so it covers most trips. If you want to charge a laptop or several devices between outlets, step up to 20,000 mAh or more, accepting the extra weight.
- Will a power bank charge my laptop?
- Only if it supports USB-C Power Delivery at a high enough wattage. Most phone-class banks will not. Among our picks, the Anker 25,000 mAh 165W is built for laptops; the others are for phones, earbuds and tablets. Check the Amazon listing for the current output spec.