This is a replacement / spare 7.4 volt, 2200 mAh Lithium Ion battery pack for your Yaesu
FTA-450, FTA-550L, FTA-550AA or FTA-750L aviation transceiver. This is the same as originally supplied with your transceiver (except the FTA-550AA). This can be used with the
Yaesu SBH-11 Charging Cradle
Yaesu 110v Overnight Charger
to add a
rechargeable battery to your FTA-550AA. Yaesu part SBR-39Li (formerly called the SBR-12Li).