BUYING TOOL
Power Bank Capacity Calculator
Match your devices, trip length, charging goal, portability, and flight comfort to a practical power-bank capacity and USB-C output target before you buy.
Why mAh alone is not enough
Power-bank capacity tells you roughly how much energy is stored, while USB-C output tells you whether it can charge a larger device at a useful speed. For air travel, the watt-hour label is the number to check before flying.
FAA PackSafe guidance says spare lithium batteries and power banks belong in carry-on baggage, gives 100Wh as the normal lithium-ion size limit, and says 101-160Wh spare batteries usually require airline approval. Airlines may be stricter.
Read the flight-safe power bank guideCheck the FAA lithium battery guidance