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.

These batteries does come with NFC (Near Field Communication) feature =============================================
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 3500mAh Rechargeable Li_ion NFC Battery:
* Brand: AceSoft .
* NFC Capabilities.
* High quality Li-Ion battery.
* Battery Type: Lithium Ion.
* Battery Capacity: 3500mAh .
* Voltage: 3.8V.
* Best Replacement for the original battery with comparable standby and talk time .3)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