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With most power banks, you're lucky if you can charge your phone once or twice. The capacity is only large enough for a quick emergency power-up. But that's not really acceptable if you have multiple devices, like a laptop, phone, and Steam Deck. If you want to charge all those devices with a single power bank, you'll need to choose carefully. The mAh number, or capacity, is the key to finding a suitable option. Anker, for example, has many portable power devices to choose from, but to charge multiple gadgets, look for banks with at least 20,000 milliampere-hours (mAh), which equals 74 watt-hours (Wh).

The maximum you can carry on a plane per bank is 100 Wh, which puts the sweet spot between 20,000 and 26,000 mAh — or 96 Wh — with the top end of that range being enough for roughly three to four full phone charges, approximately two tablet charges, or one full laptop charge for a modern system.

Put all of that together, and the ideal choice from…