- Mar 21, 2016
Sat in my lazyboy last night watching tv and occasionally playin with my s4x (nubm44) and my utilitech mod. I placed them on the floor beside my chair when not using them. Sometime shortly after 8:00 (that's when I take my blood pressure meds) I fell asleep. I woke after 12:00 to a livingroom lit up in blue light. I looked down to find my s4x on so i grabbed it and hit the tailcap switch, no luck. I dropped it because It was so hot it burned my hands. i then picked it up and quickly unscrewed the tail cap and dumped the batteries out. Blistered my hands. This morning I placed the batteries back in it and tried it out. The switch worked as it should, but the beam was very weak so I put the batteries on charge and went to work. Got home just a while ago and tore it down to see what happened. Everything was fine. The problem is the spring in the tail cap is pretty big and the battery tube is barely big enough for a 18650. The batteries I'm using are protected making them a little longer. The spring is making contact with the inside of the battery tube on occasion. This actually happened to me with one of my s4's but i thought it was because i stretched the spring a little so the batteries would work. (I didnt do this to my s4x). I'm gonna try to fix this by cleaning the inside of my s4's and s4x with alcohol then lining the tube with electrical tape. Luckily, the beam was aimed at my exterior door that's steel clad. I Wil from here on out NOT leave a battery in a laser period. My nubm44 is weak now, hoping it's the batteries are bad from the extreme heat. If you own a s4x, I advise you to line your battery tube as I am gonna do. The issue could be remedied using a button type tail cap switch like the mx used instead of the spring.