Vape Batteries and Chargers are an essential part of keeping your vape running at optimum performance. If your device has external batteries, while you can charge the device using the internal charging (either micro-usb or USB-C), it is recommended to take the batteries out and charge them using an external battery charger like the MC2 charger. The ideal method is to have spare batteries to use while your others are on charge so you are never in the position where you can't vape until the batteries are charged. Do some research on what batteries your device requires and whether they are external devices rather than internal only before making a purchase.