High Capacity 3950mAh Battery for LG Optimus F3 Compatible with:  LG Optimus F3 MS659( MetroPCS ) Package Description High Power 3950mAh Li_ion Battery Quantity:1 Battery package might vary * This battery has the same dimension as your stock battery. * You do not need a special back cover to use it. * Brand :Unbranded/Generic * Voltage: 3.8V. * Battery Capacity : 3950 mAh * High quality Li-Ion battery. * Battery Type: Lithium Ion.   * 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   6 - 12 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 .