Panasonic PQP50AA61 Cordless Phone Battery 7.2 Volt, Ni-CD 700mAh - Replacement For PANASONIC P-P507, TYPE 18 Replacement Battery for Panasonic P-P507, Type 18 - Ni-CD, 7.2 Volt, 700 mAh. 100% compatible with your OEM battery - 3 year warranty. Made with high quality Japanese cells. Synergy Digital is a Registered Trademark