For Samsung Galaxy S4 Battery Case With Holder ( MJD-0957 )Features:1.Standard Micro USB input and output, compatible with USB charger2.Compact,integrated design makes yourGalaxy S4much more amazing.3.Cut outs for all the Galaxy S4's features and gives full protection.4.Fashionable LEDindicator shows power level anytime.5.High charging efficiency.6.Efficiently avoid short-circuits, over-charging, over-discharging.Specification:*Cell type:Lithium-polymer battery Battery Case with Sleep Cover: