Vtech LS6191 Cordless Phone Battery Ni-MH, 2.4 Volt, 300 mAh - Ultra Hi-Capacity - Replacement for Vtech BT183642 Rechargeable Battery Replacement Battery for Vtech BT183642 - Ni-MH, 2.4 Volt, 300 mAh. 100% compatible with your OEM battery - 3 year warranty. Made with high quality Japanese cells. Synergy Digital is a Registered Trademark