Adopt high voltage design,applicable to the 3.8v battery Strectching of the human design,the shortest distance 40mm,the longest stretch 75mm The charger has multiple use,it can directly charge for iPad and cellphones,and it also can be the battery holder of the cell phones. Wide voltage input,globally applicable. The built-in intelligence protective system,prevents the short circuit effectively. High current output,rapid charge for mobile phones. Surport for most mainstream brands mobile phones available in the market.