This 3000mAh universal power bank for various USB devices, is an amazing solution for re-charging your devices. The power bank can charge two devices at the same time, as it has two1000mAh USB outputs. This item works for every USB device including phones. Charging the battery is easy, simply plug it into the wall. While devices are connected, it first charges the device to full capacity, and then charges its own 3000mAh battery. Micro USB cable and velvet bag are included.