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.
Here is the instruction
* To Charge the battery for LG K10 , 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)High Capacity 2700mAh Rechargeable Li_ion Battery:
* Brand: AceSoft.
* Battery Capacity:2700 mAh.
* Voltage: 3.8V.
* 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. 3)USB Data Sync Charging Cable(1M / 3 Feet):
* New generic 2 in 1 Data/Charging USB Cable.
* Charging your Cell phone by connecting this charging cable to our Wall charger.
4)Screen Touch Pen
* Soft touch tip material prevents scratching to.the screen very smooth tip
suitable for drawing,jotting notes,playing games and navigating on your device.
* Lightweight copper body
1.Smooth Movement.
2. Lightweight body (5g)
3.Finger Pressure

• "Authorized AceSoft Dealer"
• * Package includes : AceSoft 2700 mAh Rechargeable Li_ion Battery X 2.
• USB/AC Charger X 1,Screen Touch Pen X 1. USB Cable X 1
• Compatible With: LG K10 K425( AT&T )
• Accessory only, cell phone not included.

"Authorized AceSoft Dealer"AceSoft