The Nitecore F4 is a Four bay 18650 battery charger that duals as a external battery pack. Capable of simultaneously charging up to 4 x 18650 batteries the F4 has a sliding cover that will keep your batteries safe and protected from the elements. 

With a real-time LCD display the Nitecore F4 has a maximum charging current of 1A in a single slot. When used as a power-bank, the USB slots have a maximum output current of 2A. Packed with a host of safety features from Anti-Short Circuiting and Reverse Polarity Protection the F4 by Nitecore is one of the ultimate battery charger packs for your vaping devices and electrical devices!