I just bought a sigelei 100 watt box mod but the thing is im using 1 set of 2 different batteries. 1 sony vtc4 30 amp battery and 1 mxjo 35 amp battery. I was told to get another mxjo battery to be safe. At the momet I don't wish to buy another battery but If I have to I will. So I wanted to ask this question to other people. Is it really dangerous to use 1 set of two different batteries on a 100 watt mod? If so, What makes it dangerous? Is it possible it can explode? I'm vaping at 49 watts just to be safe for now.