Portable Charger Battery for iphone 3GS/4G 1900mA

Portable Portable Charger Battery for iphone ;Charger battery for iphone; External Battery for iPhone. Specification: 1. Capacity: 1900mAh 2. Input Voltage: 5.5V+-0.5V 3. Output Voltage:5.0+-0.5V 4. Input current: 500mA max 5. Output: 800 mah max 6. Size: 67x62x15mm 7. Charging time: 2-4hours 8. Chargetee: >500 times Usage: 1. Easy to take and charge conveniently. 2. Be applied to IPHONE&IPOD series. 3. Charging metod: plug into power socket of related device. 4. Charging Disply: 4 LED lights on left upside flash when charging the mobile, no flash wehn the power lover than 2.8V, it cvan show the capacity of the battery when you press the button on the right upside. 5. Charged display:4 led lights on the left upside flash one by one from left to right when charging, downside LED lighting after charging full. 6. Charging method:It can be charged by one IPHONE&IPOD plug or conncet with computer by USB cable. *Use withiPhone 4G/3GS/iPod nano3&ipod classic, touch.