mAh to Wh

Prefilled 3.7 V is a common nominal voltage. Use the label value, not USB output.

Enter the mAh from your label.

≤ 100 WhUsually allowed

100–160 WhApproval usually needed

Over 160 WhGenerally refused

Airline rules vary. This compares capacity only — check the operating carrier.

Power bank flight maths by PowerBank Pass