Northwestern Bell 3370 Cordless Phone Battery 1X3-2/3AAA/C - 3.6 Volt, Ni-MH 350mAh - Replacement Battery Replacement Battery for Rechargeable - Ni-MH 1X3-2/3AAA/C, 3.6 Volt, 300 mAh. 100% compatible with your OEM battery - 3 year warranty. Made with high quality Japanese cells. Synergy Digital is a Registered Trademark