You do not need a special back cover to use this battery This package is specifically designed for the cellphones we list here, if your cellphone is not in the list , then it's not for you. 1)Universal USB/AC Charger: * This is an universal charger, the top panel could be slided and the metal contact pins are also moveable. * You can slide it back and forth to fit virtually any size of Li-On batteries in the market. * Please see our Title pictures for detail * Here is the instruction * To Charge the battery for LG G2 mini LS885 ( Sprint ) , allow the 2 metal pins on the charger to touch the 1st and the 3rd contacts of battery. * For other batteries, it's not necessarily to be the 1st and 3rd though, please refer to the user manual. * You should see the LED light turn blue on the charger, that means the contacts has been firmly connected. * Now you could plug in the charger with the battery into a power socket. 2)New 2880mAh Rechargeable Li_ion Battery: * Brand: Unbranded/Generic . * Battery Capacity: 2880mAh . * Voltage: 3.8V. * Best Replacement for the original battery with comparable standby and talk time . 3)Folding Bracket: * Size: 5.2cm x 3.5cm. * Sits your Android Smart phones in a stylish way. * Creative 2-stage stand and adjustable design * Suitable for your smartphone or tablet upto 8". * Miniature size, convenient to carry