Panasonic KX-TCM410 Cordless Phone Battery Replacement For 3-1/2AA w/Mitsumi Battery - (3.6V 400mAh) Replacement Battery for Panasonic P-P301, Radio Shack 23-281, Sony BP-T16, Toshiba, Uniden BT-185 - Ni-CD 3-1/2AA w/Mitsumi, 3.6 Volt, 350 mAh. 100% compatible with your OEM battery - 3 year warranty. Made with high quality Japanese cells. Synergy Digital is a Registered Trademark