Uniden BT1021 Cordless Phone Battery Replacement for Uniden 65AAAH2BMS Cordless Phone Battery Replacement Battery for Uniden 65AAAH2BMS - Ni-MH, 2.4 Volt, 750 mAh. 100% compatible with your OEM battery - 3 year warranty. Made with high quality Japanese cells. Synergy Digital is a Registered Trademark