Enhance iPhone4 signal Power check & indication Power switch Protective and powerful Signature: Standby time-up to 170 hours Talk time-up to 4.5 hours Internet Use-up to 4 hours on 3G&up to 6 hours on Wi-Fi Audio Playback-Up to 22 hours Video Playback-up tp 6 hours

Capacity:1800mAh
Battery typ:Polymer Lithium-ion battery
Output voltage:DC5V
Output current:500mA
Input voltage:5V
Input current:500mA
Charging time:4-6hours
Cycle life:＞500times
Using Temperature:-10℃~ +40℃
Storage Temperature:-20℃~ +50℃
Color:gloss back,matt black
Remark:gloss items sprayed UV glossy oil(protecting scratched);matt items sprayed rubber oil(protecting slip)