Estone 5V 2A Mobile Power Supply USB Battery Charger 18650 Box For Phone MP3 MP4 Black/White (Black) This product is a mobile power boxes, circuit board plus box. (Without batteries) placing 1-4 lithium batteries 18650,it can be used. Versatile: 18650 battery box, Intelligent charge, protection, active, power display, lithium DIY boost mobile power Intelligent charging with indicator to show the charging status With identification resistor, can charge most cell phones as well as iPhone and other Apple products Output current-limiting protection to avoid damage when over load Switch and Ports (from Left to Right): Power switch, LED flashlight, charging input, USB output, mini USB charging input and indicator for charging status