Had a fresh 18650 in my magneto and it stopped vaping. tried my other protank thinking I dont know what, nothing. Changed to a 18350 4 times nothing. Took everything apart cleaned it nothing. At this time I was gettin very upset. I start pushing the fire button over and over then it hit me it wasn't moving. Took that part off again nothing seemed wrong. As I was putting it back on I realised the stop fire was screwed down so it wouldn't fire. All batteries work now but boy do I feel like a ... jack!!