The new Samsung Portable Battery charges with Samsung Fast Charge and Quick Charge 2. 0 support that lets you power up quick when you’re on the go. Overcurrent and Over Voltage Protection means you’ll power up safely without having to worry about excessive current levels damaging your device. Twice the advantage. Thanks to its dual-port charging capability, Samsung Portable Battery can power two devices simultaneously for added convenience and far less hassle. Click the ‘Battery Check’ button on the top of the device to instantly switch between fast-charging and dual-charging with two devices.