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
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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100% Brand New.
1)New 2150mAh Rechargeable Li_ion Battery:
* Brand: Unbranded/Generic .
* 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.
2)Micro USB Flat Cable ( 3 Feet/1M ):
* 100% Generic New and Good Quality.
* Standard Micro USB Connector which could compatible with most devices that have Micro USB Port.
* New generic 2 in 1 Data/Charging USB Cable.
* Provides high-speed data transfer rates. Software is not included.
* Charging your Cell phone by connecting this charging cable to our Wall charger or USB car charger.
* Provides data transfer, syncing functions in between your cell phone and your PC or laptop via USB port.
* Charge your device through a computer''s USB port or a USB power adapter.

• * Battery type: Li-ion; Voltage: 3.8V; Capacity: 2150mAh
• * Package includes: New 2150mAh Rechargeable Li_ion Battery X 1.
• * Micro USB Flat Cable 3ft X 1.
• * Compatible with: Samsung Galaxy Amp 2 SM-J120A( Cricket )
• * Accessory only, Cell phone not included.

* Battery type: Li-ion; Voltage: 3.8V; Capacity: 2150mAhSharpCost