Carryvolt: Power Bank Check

Carryvolt is for the moment at the security tray, when someone asks how many watt-hours your power bank has and all you can see is "20000mAh" in tiny grey print. Photograph the label and Carryvolt reads it right there on your iPhone. Apple's on-device text recognition picks out the mAh, the cell voltage and the watt-hour figure if the maker printed one, and does the conversion when it didn't. You get the number staff actually check, in a size you can read. Your bag is a list of luggage tags: the power bank you always carry, the slim magnetic pack, the camera spares, the laptop. Each one shows its watt-hours and whether it is cleared, needs the airline's blessing, or cannot fly at all. Rule cards hold the limits. The built-in card follows the worldwide baseline that came into force in March 2026 — two power banks per passenger, nothing above 100 Wh without approval, nothing above 160 Wh…