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)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 3400mAh Rechargeable Li_ion Battery:
* Brand: Deep Stretch .
* Battery Type: Lithium Ion.
* Battery Capacity: 3400mAh .
* 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.
3)Fish Bone Winder Rubber:
* Flexible and washable if need .
* Unique cable winder for organizing your earphone cord
* Compatible with Headphone Cable,Telephone.Cable, Mouse Cable,etc
* Size: 6.4 cm x 2.8 cm Material: Silicone
* Color:as shown in pictures.

• * Authorized Deep Stretch Dealer
• * Package includes : New 3400mAh Rechargeable Li_ion Battery X 2
• * Travel Dock USB/AC Charger X 1; Fish Bone Winder Rubber X 1
• * Compatible with: Samsung Galaxy On5 S550TL( Straight Talk/TracFone/Net10 )
• * Accessory only, cell phone and Earphone not included.

* Authorized Deep Stretch DealerDeep Stretch