AT&T 2420 Cordless Phone Battery Replacement For Cordless Phone Battery 3 AAA - Replaces AT&T 2419, 2420, Vtech 80-5542-00, Olympia CDP models Replacement Battery for AT&T 2419, 2420, Vtech 80-5542-00 - Ni-MH 3 AAA, 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