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LiPo Air Travel Sticker
The airline limits for spare LiPos, on your LiPo bag.

Details
Airlines count lithium packs in watt-hours, but most FPV packs only print volts and mAh. This grid does the maths for the usual packs: Wh = cells × 3.7 V × mAh ÷ 1000.
White is up to 100 Wh: a spare goes in your cabin bag. Hatched is 100 to 160 Wh: cabin only, with the airline’s approval, at most 2. Red is over 160 Wh: cargo only. The colours hold for LiHV (3.8 V) and Li-ion (3.6 V) packs of the same size too; only the numbers move by about 3%.
If the pack doesn’t show its Wh, carry its spec sheet: staff may refuse a pack they can’t check. Limits from the 2026 ICAO/IATA passenger rules; airlines may be stricter. Pairs with the LiPo Air Travel sticker.
Check the quality of my sticker article here.