Power Bank, TOPCHANCES 2800mAh Portable External Battery Backup Charger for iPhone 5S, 4S, iPad ,iPods, Samsung Galaxy, HTC One, EVO, Thunderbolt, Motorola ATRIX, Droid, Moto X, Google Glass, Nexus 4, Nexus 7, Nexus 10, LG Optimus, PS Vita (Pink) High quality and 100% brand new. Compatible with iPhone, MP3, MP4, PSP, or any other mobile digital products. The lithium-ion polymer, long service life,more safety The power supply output plug in USB port, data can be realized at any time, at any time , with charging mobile phones at any time electric power demand, away from the power problems.