I had just put my Maraxus Ironman clone together with an efest purple IMR 18650 3.7v 35a 2500mah battery and an Kanger Aerotank 2ohms. I had already tested it once with an identical setup. As soon as I touched the fire button I burnt my finger it was so hot. I quickly disassembled everything. And let it cool. After cooling I tried that same battery in my Vamo worked fine tried an identical battery in the Maraxus and it worked fine. Tried the battery from the earlier setup it worked fine. I did notice the battery had a small section about a millimeter by two millimeters were the purple covering had torn off. Could this have shorted out the battery or is it possible I overtightened the Maraxus since it is telescoping. Going to just use the Vamo for now. Thanks in advance for any and all help.