My unit seems actually faulty at the end, lol.
Whenever the battery is as low as 30-40% remaining charge.
M iv-1s
(or whichever revision with iv1 body and adjustable temp on the go I got)
resets to ecapple welcome screen in the middle of heating itself and loops it. Heats from room temp to 75°C and then displays home screen forgetting to reach vaping temp at all. Codename of my unit or worse, batch of units, could be "crafty" ecapple, since this (firmware?) bug basically means my battery life is halved.