Hello everyone, I'm new to vaping so pardon my ignorance. I started vaping with the ego's and I enjoy using them but a few weeks ago i was charging a battery and i noticed the lights were off so i checked it and the charger was hot it had started to melt. This worried me so i started looking into mechanical mods foolishly thinking they were safer. I ended up buying a kts mechanical mod, two 18650 IMR 3.7V li-mn efest 2000 mah batteries and a trustfire 3.6V/3.0v charger. When i received the mod and batteries i tried them out using a rebuildable phoenix atomizer prebuilt coil. It fired up about six times then stopped. My 2 cent protection fuse apperently blew. I thought it had malfunctioned so i began vaping without it and again i got maybe 6 hits before it stopped, i then thought maybe the batteries needed to be charged so i charged them for a while until the light was green on the charger. I vaped with it today and got 10 good hits before it stopped. I then switched batteries and tried again with no luck i checked the second battery and the top was pretty hot. Is there a short in my mod ? I should add the phoenix atomizer is working fine on my ego. I'm planning on getting a volt tester soon. I really would like to keep using the kts mod but don't know where i should go from here. Any advice would be appreciated.