Battery Case is also called “external battery“, “Back battery”, “back power”, “digital charging companion”. It is not only a mobile power, as well as a protective cover. Currently there are many on the market are designed around a mobile phone brands model. In protecting the cell phone is also capable of providing adequate power, very convenient and practical. Battery Case usually design lightweight, compact, easy to carry, easy mobile use. Charger to the back clip battery a full charge, plug in your iPhone to charge a mobile phone battery life, charging at any time, while also protecting your cell phone safe from harm, two birds with one stone, Big Apple powder, no longer worry about a cell phone battery problems. Mobile phone partners is not to be missed.