PowerBank Pass

PowerBank Pass is a free guide and checker for ordinary lithium-ion power banks on flights. It helps travellers read a capacity label, convert milliamp-hours to watt-hours, and compare those figures with each operating airline's published rules on how many banks you may carry, whether a bank over 100 watt-hours may be accepted, and whether in-flight use is allowed. The site holds 30 airline records, links direct official sources, and keeps missing or conflicting information visible.The trip checker asks you to use the watt-hour figure printed on the bank when it is available, or to calculate stored energy from the labelled milliamp-hour capacity and nominal cell voltage. A converter uses the formula watt-hours equals milliamp-hours times volts divided by 1,000, and warns that USB output voltage or charging watts are different ratings. Worked examples show, at a nominal 3.7 V, that 20,000 mAh is 74 Wh and 30,000 mAh is 111 Wh, on either side of the common 100 Wh reference. These are calculations, not product approvals, and there is no single milliamp-hour limit for every voltage and airline. You can add each flight by the operating airline on the ticket, including connections, and save a trip card that keeps sources and check dates with the result.An airlines directory opens a record for each of the 30 carriers. Records note count limits, treatment of banks between 100 and 160 Wh, and use-on-board wording, plus the date the source was last read and a flag when official pages disagree or a point is an interpretation. Separate articles cover packing when a cabin bag is gate-checked, the difference between permission to carry and permission to use a bank on board, and when a domestic leg in China may need the 3C mark. The checker covers ordinary lithium-ion power banks only, with separate notes for medical batteries, smart luggage and other devices. No sign-in is required.