Hello, It seems you have a battery connection issue. In mods utilizing 18650s, you have to ensure that you are getting a good connection in your battery sled. with moth flat top 18650s the plastic ring around the positive terminals sometimes interfere with connection. try tightening the connections by carefully squeezing the top and bottom of the mod together, this forces the connections to fit more tightly, and should fix your problem. If that doesn't work, another fix is, if possible, solder a small nub onto the positive side of the battery. This nub allows the positive terminals to fully make contact. I hope that helps. -Paul S.