Panasonic PP501 Replacement Battery for Panasonic 900MHz Phones Replacement battery for Panasonic 900 MHz phones Works with Panasonic KX-TC1400, KX-TC1410, KX-TC1430, KX-TC1520, KX-TC1700 Also works with some Cobra, NW Bell, and SW Bell phones It is 3.6 volts, 600 mA It has 90-day warranty