• Capacity: 1800mAh (Polymer Lithium-ion battery )
• Output voltage/current: DC5V/500mA
• Iutput voltage/current: DC5V/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)
• 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