On board Reverse Polarity Protection: Reverse polarity protection can be successfully achieved by the application of special battery anti reverse circuit adopted in the circuit board.
Upgrade-able firmware: You can upgrade your firmware through the micro USB port. Moreover, the upgradeable firmware will make you keep up with the vaping evolution.
It is better to take out the lithium-batteries from the device and then charge the cells.
Moreover, it can also be charged via USB cable.
1*Reuleaux RX200(without cells)