No more worry about dead battery of your smart phones, tablets or other USB powered devices. The 10000mAh Power Bank delivers fast charging to your 2 devices at the same time with total output of up to 3.1A. The LED indicators let you know the status clearly. And with its compact size, it's a great companion for travel, business trip and other outdoor activities. Built-in safeguards protect you devices against short circuit, over-voltage, over-current, over-charge, over-discharge, and over-heating.