... for your chose Smart design Fashional 1900mAh for iphone4 battery case 1) Battery capacity: range from 1000-2000mah optional (Polymerl Lithium-ion ... battery) 2) Compatible with all generations iphone,ipod,ipad,etc 3) ... ) Four Led light indication, Press on the button to indicate real power in battery case from 25%,50%,75%,100% 1900mAh for iphone4 ...