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.
======================================================================
100% Brand New.
1)New 3150mAh Rechargeable Li_ion Battery:
* Brand: Sporting Persistence .
* High quality Li-Ion battery.
* Battery Type: Lithium Ion.
* Battery Capacity: 3150mAh .
* 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)Folding Bracket:
* Color: as shown in picture.
* Material: durable& lightweight plastic.
* Size: 5.2cm x 3.5cm.
* Sits your Android Smart phones in a stylish way.
* Creative 2-stage stand and adjustable design
* Suitable for your smartphone or tablet upto 8".
* Miniature size, convenient to carry

• * Authorized Sporting Persistence Dealer.
• * Battery type: Li-ion; Voltage: 3.8V; Capacity: 3150mAh.
• * Package includes : New 3150mAh Rechargeable Li_ion Battery X 1.
• * Compatible with: LG Optimus L90 D415 ( T-Mobile )
• * High Quality,100% Brand New.

* Authorized Sporting Persistence Dealer.Sporting Persistence