AceSoft Replacement Battery for HTC Hero S Package includes:   1 x 2280mAh Li-ion Battery Compatible with:   HTC Hero S ( U.S. Cellular ) Package Description AceSoft 2280mAh Li_ion Battery Quantity: 1 Battery package might vary You do not need a special back cover for this battery. * Brand:AceSoft * Battery Type: Lithium Ion. * Voltage: 3.7V. * High quality Li-Ion battery. * Battery Capacity: 2280 mAh.   * Keep an extra battery on hand for extend standby and talk times. * Integrated microchip prevents overcharging and lengthens battery life. * The best replacement spare battery for your phone. * 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. * This Battery could also be charged in the phone directly thru the cell   phone charger .