Guys, I really need some help here. I bought the Zmax mini a short while back. Ordered my batteries seperate on eBay (trustfire 18350 button tops). Everytime I go to fire it, flashes and shuts off.?? Tried both batteries and the same thing. Yes, they are fully charged. Tried several different c5's, Kanger T3, Boges, and the same results. Thought it must be crappy batteries and ordered an extension and two trustfire button top 18500's from My Vapor Store. Yep, same thing. Talked to customer service and they said send it back. Talked to them a few days later and they said they used it all day with several different catos/clearo's and had no problems. He said he would keep it one more day and try anything he could to make it misfire before he would send it back and it never did. They sent it back to me and guess what, same thing. ????????????????????? Called em back and they said it's got to be the batteries so I planned on buying a test battery on Mon then I got thinking maybe they used flat tops. Not new to vaping but new to apv's so don't know how much difference that would make. So here i sit with a $90 paper weight hoping some one can help. Thanx in advance.-Nate