Mophie is a Californian company, a world leader in manufacturing of protection cases with built-in additional batteries. It was Mophie that developed the first battery case which was certified by Apple Inc. So, be assured, Mophie products are compatible ideally with iPhone/iPad/iPod. More than that, products of this brand name are not only high-tech, but also have elegant design.
Additional batteries from Mophie will be useful for those who come short of power of a standard battery for all the day long.