Verbatim Power Pack 3500 mAh - 97933 Universal Power - Charge it all! With a 3500mAh lithium-ion battery, the Portable Power Pack supports charging a wide range of devices such as iPhone, iPod, and micro USB charged smartphones and wireless Bluetooth headsets. Talk, listen to music and play games for longer, Charge a wide range of devices including iPhone, iPod Touch/Nano/Shuffle , micro USB charged smartphones and wireless bluetooth headsets, Lightweight, slim design makes it ideal for travelling, LED indicators display the power status of the power pack, press the power check button to show the amount of power remaining, Power on / check power button, Provides approximately 175% of a smartphone charge.