external rechargeable power pack battery for iphone 3G/3GS
1.virtually twice battery
2.protective hardcase
3.OEM welcome

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power pack caserechargeable battery case for iphone 3g 3gs
Straight rechargeable batteriesexternal rechargeable battery for iphone1200mAh for iphone external battery caseone year warranty 
external rechargeable power pack battery for iphone 3G/3GS 

 Technical specifications:

·                Battery: Rechargeable 1800 mAh lithium polymer

·                Standby time: Up to 380 hours

·                Talk time: Up to 6 hours on 3G ; up to 12 hours on 2G

·                Internet use: Up to 6 hours on 3G; up to 7 hours on Wi-Fi

·                Audio playback: Up to 28 hours

·                Video playback: Up to 8 hours

·                Dimensions (HxWxD): 113 * 66 * 21 (mm)

·                Gross Weight: 190 grams

Features:

Battery and Case in One

Charging battery without removing from the case
4 Light LED Battery Status Indicator
On/Off Switch to determine if you use external battery or not

Sync to computer or iTune from the battery case

OEM LOGO or Packaging service available

Packaging:

1.  Color box packing

2.  iPhone 3G/3GS external battery

3.  USB-micro cable

4.  User’s manual

Color availability:

Black, white

Production LOGO:

No LOGO or As per customer OEM LOGO requirment

MFI LOGO available if Apple license received from the buyer