This package is specifically designed for Samsung Galaxy Amp 2 Model SM-J120A from Cricket as we stated in our listing.
There are many Samsung Galaxy Amp in the market, they all use different battery
If you do not have Samsung Galaxy Amp 2 SM-J120A, this package is not for you. You do not need a special back cover to use this battery
100% Brand New.
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 2150mAh Rechargeable Li_ion Battery:
* Brand: Unbranded .
* High quality Li-Ion battery.
* Battery Type: Lithium Ion.
* Battery Capacity: 2150mAh .
* Voltage: 3.8V.
* The best spare battery for your phone.
* 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.
* Integrated microchip prevents overcharging and lengthens battery life.
* This Battery could also be charged in the phone directly thru the cell phone charger.
3)USB Data Sync Charging Cable 1M/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.

• * Package includes : New 2150mAh Rechargeable Li_ion Battery X 2 .
• * Travel Dock USB/AC Charger X 1; Micro USB Data Cable ( 3 Feet/1M ) X 1.
• * Compatible with: Samsung Galaxy J3 SM-J320R U.S. CellularSamsung Galaxy Amp 2 SM-J120A Cricket
• * Accessory only, cell phone not included.

* Package includes : New 2150mAh Rechargeable Li_ion Battery X 2 .SodaPop