Give your customers the gift of power and help them stay connected! The Sybil UL Certified Slim Power Bank features anodized aluminum housing, a 4000mAh lithium ion grade A non-recycled battery, an output of 5 volts/1.0 amp and an auto on/off overcharging function. Connect any USB cable or use the included Micro USB cable to recharge devices and the power bank itself. Each power bank comes in an individual box and can be customized with a brand name, logo or message.