External Battery for iPhone 4
Features:
1)Replacement for iPhone 4
2)Capacity: 1900mAh
3)Cell type: Lithium-ion polymer
4)Dimension: 125*63*17.5
5)Output Voltage: 5V
6)Output Current: 500mA
7)Cycle life: 500 times
8)Standby Time: Up to 230hours
9)Talk Time: Up to 6 hours
10)Internet Use: Up to 5.5 hours on 3G network & Up to 8 hours on Wi-Fi
11)Audio Playback: Up to 30hours
12)Video Playback" Up to 8 hours
13)Origin: China
14)Warranty: 12 months