Theo&Cleo Green 3.6V 700mAh Ni-MH Battery For Uniden BT909 Cordless Phone Stay connected with families and friends by getting extra battery power today with this Uniden BT-909 Cordless Phone Ni-MH Battery This replacement battery has an integrated microchip that prevents overcharging and lengthens battery life Best replacement for the original battery with comparable standby and talk time Great bargain with excellent quality guaranteed