RAVPower Pioneer Portable Battery, 3 ports, 10000 and 20000 mAh, 20 Watts - Black Warranty: 24 months The ideal solution for charging your devices in various places, a portable battery with iSmart technology, the smart feature that provides each device with its energy needs High protection It features protection from high temperatures, protection from overcharging, voltage, current or diamonds, in addition to an LED indicator that displays the available power level in the battery and charging status Charge multiple devices It has two USB ports and a Type-c port, charging almost all USB powered devices including laptops, tablets, smartphones and more.