Power Bank 18650 case for Fx-608 board.
This kind of case hosts 4 18650 batteries and a Fx-608 charger board. The Fx-608 charge the batteries and have 2 USB plug. The power of the circuit is 2.1 A. I charge the last model iPad and also the iPhone 5/6 or Samsung S7. I use this also like a power Bank for my iron welder.