Imeo I vape low resistance attys with 3.7 and the heat is almost instantaneous after the first hit and its is really hot i have to hurry to disassemble the ggts before I got burned. Thats was with red AW 18650, green Tenergy 18650 and gray Ultra Fire 18650 on my old GGTS, I had not tested the magnets on my newer GGTS.
@nancyDC, what atomizer are you using, i.e. 510, 901, etc? a lot of times the button or tubing getting hot has to do with a short caused at the atomizer or from the spring (i.e. the spring touching the side of the tube). it's unlikely that it's the spring in the GG units because of their length and how they are seated, but the atomizer or an aftermarket adapter can be a culprit if it is screwed on too tight and a direct short develops. does the atomizer appear to have been dislodged at all from the silicone grommet on the underside (adapter side), or are you using an aftermarket adapter at all, like a 510 -901 on the GGTS or 901-510 on the GGTB?
when the tubing gets hot it means the batteries are hot, and when the batteries are hot, even warm, it's because a short has occurred and the batteries have discharged rapidly. if this is the case then the there could be an issue with the safety of the batteries and even their ability to maintain the charge. check them with a multimeter if possible. but it sounds like an atomizer or adapter issue that may have caused a direct short resulting in the battery discharge and instantaneous heating of the tube and/or button.
