I just got a k100 mod from my local vape shop, and it worked fine for a while... Except the battery charger doesn't work. Any reasons you guys can think of. Also, the cartomizer stopper working. It was working fine, until i took it off and out it on a smaller battery, then i put it back on and it doesn't even make a noise, and i put my protank on it and it works fine with the k100. And then i put the carto back on the little battery and it works on there but just not the k100...? Any suggestions???