Acase Aegis Power External iPhone 4 Battery Case

This great looking flat black iPhone 4 battery case is dishing out 1700mAh which gives you a little more than your internal battery does.   It’s a pretty good deal for only $50 you get a case and a battery.
**Bonus: A free high quality screen protector will be included in the package
- Fully Support Charge and Sync with Case On

- Smart Switch, Gain more control over charging to enhance Safety – Accurate LED power indicator, flashing when battery runs low

- Perfectly design, offer a full protection only for iPhone 4

- Standby Time: Up to 450 hours, Talk Time: Up to 7.5 hours on 3G