The Spare 10000 mAh Power Bank features a 10,000 mAh/37Wh Grade A Lithium Ion battery, LED indicator lights and a flashlight. Charge up to three devices at once with a max output of 5V/2.1A. Includes a USB-to-Micro-USB connecting cable which can recharge the battery backup or other devices with a Micro-USB input, like Android Smartphones from Samsung®, Motorola®, HTC®, Nokia®, and others. Power banks are permitted in carry-on luggage only, and at the discretion of TSA agents. Please charge the power bank before initial use.