The cell phone battery is designed to work for Samsung I9100. This superior battery is perfect for people who have busy calls， need longer talking time， and go without an access to an external charging alternative. Enjoy extended use of your mobile phone with this superior battery. Featuring high technology， this battery consumes less power so that you can efficiently and conveniently run your phone. <br>Easy to charge your battery without the phone， this Battery charger for Samsung Galaxy S2 i9100 is a necessary device on your office desk or at home. Such Battery charger is great partner for you as a backup battery charger! This mobile phone charger featuring quick charge with automatic constant current control prevents battery from overcharging， short circuit， and electronic shock， preserving your battery′s life span.                                    Features            New 1800mAh Replacement Battery for SamSung Galaxy S II I9100High quality Li-Ion batteryBest replacement for the original battery with comparable standby and talk timeKeep an extra battery on hand for extend standby and talk timesIntegrated microchip prevents overcharging and lengthens battery lifeThe best replacement spare battery for your phoneOur battery is sent out with little or no power， so please charge it for about 4 - 6 hours before usingThe 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 operatorBattery charger for Samsung Galaxy S2 i9100New Battery Charger for SamsungEasy to charge your battery without the phoneBuilt-in protection circuit prevents overcharging and heatsCharge from a USB port or power outletCharge two batteries at the same timeCE and CCC certification                                                            Specifications            Battery type    Lithium Ion    <br>Battery capacity    1800 mAh    <br>Voltage    3.7V    <br>Weight    1.09 oz    <br>Color    Black    <br>Dimensions    2.36" x 1.77" x 0.28" (L x W x H)    <br>Input    AC 100 - 240V ~ 50 / 60Hz 0.15A    <br>Output    DC 4.2V 350mA -- + 50mA    <br>Output    USB 5.2Vd.c. 800mA    <br>Dimensions    3.27" x 1.97" x 1.02" (L x W x H)    <br>Weight    1.9 oz    <br>Color    Black    <br>                                                            Package Includes            3x 1800 mAh Battery for Samsung I91001 x Battery charger for Samsung Galaxy S2 i9100