Century Accessory Extended Battery for Samsung Galaxy Stratosphere 2 II i415 Stay connected with your family and friends by getting extra battery power today This replacement battery has an integrated microchip that prevents overcharging and lengthens battery life Our battery is sent out with little or no power, so please charge it for about 4 - 6 hours before using The battery operation time depends on conditions such as: Transmitting power level, Signal (distance between the phone and the base station), Network parameters defined by the operator Easy to carry , install and remove