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.
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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 Samsung Galaxy Alpha ,SM-G850A(AT&T) , 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. * The LED Light will turn Red when charging the battery, turn blue to indicate the battery is fully charged. 2)New 3500mAh Rechargeable Li_ion Battery:
* Brand: Unbranded/Generic .
* High quality Li-Ion battery.
* Battery Type: Lithium Ion.
* Battery Capacity: 3500mAh .
* Voltage: 3.85V.
* Best Replacement for the original battery with comparable standby and talk time .
3)USB Data Sync Charging Cable 3 Feet:
* New generic 2 in 1 Data/Charging USB Cable.
* Charging your Cell phone by connecting this charging cable to our Wall charger.
* Provides data transfer, syncing functions in between your cell phone and your PC or laptop via USB port.