Masterplug, considered experts in all things power provide safe and convenient charging options for vapers around the world. With surge protection built in on the majority of their products, you can safely recharge yourexternal 18650 batteries as well as e-cigarettes with built in batteries. 

It is also crucial that you use the correct battery chargers for your device. Batteries are one of the most important part of any electronic cigarette device and should be taken seriously.