Vape Alley guy in back is super. I brought in a Spinner battery I'd had 7-8 wks which had been giving me trouble since I bought it, he tested it with his own tank and had clouds of vapor, I couldn't understand why it barely worked at all for me. But he ended up just giving me another battery. I will see if the original one still barely works after I clean the threads of my tank and take it back if it doesn't. Meantime, I'd love to have a tank like his to have big clouds of vapor. Next tank purchase!