iPhone 3G/3GS 2300mah backup rechargeable battery case

Item: iPower2000

iPhone 3G/3GS compatible

Battery capacity: 2300mAh
Size: 116*66.6*24mm
Talk time: up to 7.5h
Video playback: up to 8/10.5h(3G/3GS)
Audio playback: up to 30/36h(3G/3GS)
Standby time: up to 450h

Features 

iPower2000 built-in 2300mAh lithium polymer rechargeable battery with stylish case, it doubles the talk time of your iPhone 3G/3GS, offers a slim plastic case that protects your iPhone 3G/3GS in a stylish way!

• iPower2000 comes with a built-in, safety tested, advanced lithium polymer high capacity rechargeable battery.
• Syncing iPhone 3G/3GS with your computer, while your iPhone 3G/3GS is docked in the iPower2000 
• Backup battery juice charging status indication LED: One blue light indicates charging within 60%,two lights indicate charging up to 80% and three led lights indicates that charging is completed.
• On/Off switch to control the iPhone backup battery status.
• Auto-turn off 3 seconds later after checking battery without iPhone3G/3GS docked in.