You do not need a special back cover to use this battery
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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 LG K7 , 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 2550mAh Rechargeable Li_ion Battery:
* Brand: Unbranded/Generic.
* High quality Li-Ion battery.
* Battery Type: Lithium Ion.
* Battery Capacity: 2550mAh .
* Voltage: 3.8V.
* Best Replacement for the original battery with comparable standby and talk time .
3)Micro USB 2in1 Cable ( 3 Feet/1M ):
* 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.

• * Package includes : New 2550mAh Rechargeable Li_ion Battery X 2.
• * Universal Travel Dock USB/AC Charger X 1;Micro USB 2in1 Cable ( 3 Feet/1M ) X 1.
• * Compatible with: LG K7 Ting
• * Accessory only, cell phone not included.
• * High Quality,100% Brand New.

* Package includes : New 2550mAh Rechargeable Li_ion Battery X 2.Sharpcost