BATT-2419 - Ni-MH, 3.6 Volt, 700 mAh, Ultra Hi-Capacity Battery - Replacement Battery for Uniden BT-0001 Cordless Phone Battery Replacement Battery for Uniden BT-0001 - Ni-MH, 3.6 Volt, 750 mAh. 100% compatible with your OEM battery - 3 year warranty. Made with high quality Japanese cells. Synergy Digital is a Registered Trademark