Hey guys. So my Darwin has become my main PV after just being tired of a constant 3.7V of my Reo. The problem i've been having is my Darwin's battery life not even lasting a day through about 1.5ML of vaping. I use a tank mod on it and i've been having issues. When i'm not vaping I remove the tank/carto and just close it, but when i'm vaping, i'll have the carto/tank attached to it for a good 5-10 min on the on position. After about 3/4 of a day, the battery is completely dead. Is this just a bad battery? Or is there some issues with the PV? Or does leaving the Darwin on the on position just destroy the battery? Any help would be great. Thanks guys!