A great info-graphic below with some simple and helpful tips on battery safety. Although a rare occurrence problems can occur if your batteries are not treated with respect and care and proper procedures for charging. One thing I would highlight from the below info-graphic is to never leave an ecig battery/mod etc on charge while you are not in your house. That is the number one safety rule in my opinion, if your there and something goes wrong you can attend to it before it becomes a bigger problem.