... Very good quali 1900mAh power pack for iphone 4, external backup battery2012 newest power pack,protable power pack, good quality power packFeature: The external battery ... days or more of uninterrupted iphone power,denpending on your usage.The power pack is made of the highest quality ... the phonesuit,you can have portable power,anywhere,anytime you need it. 2012 power pack for iphone 4 with 1900mAh