High Power 2x 2010mAh battery+Multi Function USB Charger for Samsung Galaxy Proclaim S720C
You do not need a special back cover to use this batteryThis package is specifically designed for the cellphones we list here, if your cellphone is not in the list , then it's not for you.======================================================================100% Brand New.1)AC/USB Desktop Battery Charger :* Quick charge with automatic constant current control prevents battery from over charging, short circuit, and electronic shock.* Charge your cell phone battery without the phone.* Also work with OEM (original) battery.* LED charging light indicator. Turn red in charging, turn blue when done.* Input: AC 100-240V 50/60Hz 150mAh.* Output: DC 4.2V 350mAh  50mA.* USB Port Output: 5.2V 800mAh.* Use this charger to charge the stock battery as well, swap one out when the other dies.2)New 2010mAh Rechargeable Li_ion Battery:* High quality Li-Ion battery.* Battery Type: Lithium Ion.* Battery Capacity: 2010 mAh.* Voltage: 3.7V.* The best spare battery for your phone.* Best Replacement for the original battery with comparable standby and talk time .* Our battery is sent out with little or no power, so please charge it for about 6 - 12 hours before using.* Keep an extra battery on hand for extend standby and talk times.* Integrated microchip prevents overcharging and lengthens battery life.* This Battery could also be charged in the phone directly thru the cell phone charger.