Rayovac RAY77 Cordless Phone Battery Replacement For 2AA w/Reverse Molex - Sony BP-T50 for SPP-N100x Models Battery Replacement Battery for Sony BP-T50 for SPP-N100x Models - Ni-CD 2AA w/Reverse Molex, 2.4 Volt, 800 mAh. 100% compatible with your OEM battery - 3 year warranty. Made with high quality Japanese cells. Synergy Digital is a Registered Trademark