بطارية BP37X850 (3.7V 850mA) _280X TX

Was a bit worried about matching the OEM part number, but AE1102338P lined up perfectly and the 850mA cell holds a charge way longer than the old one did. The transmitter runs all afternoon now without me swapping anything.

Dropped this into my 280X transmitter and it powered right up — the 850mAh holds a charge noticeably longer than the old one did. The connector clicked in snugly on the first try, no fiddling needed.

Fits my 1900X receiver fine and the 850mA capacity holds a charge noticeably longer than the tired pack it replaced. Only gripe is that the connector tabs needed a bit of wiggling to seat properly.