Ok i gust got the fuchai 200. It will fire down to .05. My question is battery safety i got the sonny 18650 2600mah and i have a new set of efest3100 mah both r 3.7v. So my real question is according to the charts i have found neither can go that low so is there other things in the device that allows it to be safe or am i looking at bad charts. Or the device may fire but not safely.