Can I bring a 20,000mAh power bank on a plane?

Yes. At 3.7V, a 20,000mAh battery is 74Wh, which is well under the TSA's 100Wh carry-on limit. You must carry it in your carry-on bag, not checked luggage.

How long does it take to recharge a 20,000mAh power bank?

With a 20W charger: 6-8 hours. With a 45W charger: 3-4 hours. With Anker's 100W+ system: under 1 hour. The recharge speed depends entirely on the input wattage the power bank accepts.

Best Power Banks 20000mAh 2026