ATC 2Pack Panasonic P-P511 Phone Battery 3.6V 2400mAh Ni-MH Rechargeable Cordless Phone Battery for Panasonic KX-TGA270 KX-TGA270S Brand New | Ni-MH | 3.6 Volts | 2400 mAh | Black 100% OEM Compatible - compatible with or Exceeds OEM Panasonic P-P511 Battery specs Masione replacement battery has an integrated microchip that prevents overcharging and lengthens battery life. Great bargain with excellent quality guaranteed. 1 Year Warranty