• Color: matt black, matt black and blue

• Capacity: 2300mAh (Li polymer battery Lithium-ion)

• Output voltage/current: DC5V/500mA

• Iutput voltage/current: DC5V/500mA

• Charging time: 4-6hours

• Cycle life: more than 500times

• Using Temperature: -10° C~ +40° C

• Storage Temperature: -20° C~ +50° C

• Remark: gloss items sprayed UV glossy oil(protecting scratched); matt items sprayed rubber oil(protecting slip)

• Enhance iPhone4 signal

• Power check & indication

• Power switch

• Protective and powerful

• Standby time-up to 250 hours

• Talk time-up to 6.5 hours on 3G & up to 15 hours on 2G

• Internet Use-up to 6 hours on 3G& up to 9 hours on Wi-Fi

• Audio Playback-Up to 35 hours

• Video Playback-Up tp 9 hours