The Power Crystal is a lithium polymer 1 cell rechargeable battery pack that is highly portable but also houses an impressive 2000m Ah battery, easily powerful enough to fully charge your devices on the go. It is small enough to fit into your bag & be carried around with causing an inconvenience, & also features a loop at the top of its casing, allowing you to attach a lanyard for even easier portability. It has a charging time of 4.5 hours, & features 6 tips for charging different phones & devices from different brands from the iPhone & iPad to Nokia, LG, Micro & Mini USB (Universal Serial Bus) & Samsung. It even displays four LEDs to allow you to see how much power is left in your battery pack to charge other things! The Power Crystal charges a number of devices to provide sustained charge, listed below Mobile Phone: Up to 12 hours extra talk time MP3: Up to 60 hours extra music time Gaming: Up to 10 hours extra play time Ditigal Camera: Up to 700 extra photos time