I have never noticed it before but have read about it. Not long ago I bought a Wismec Sinuous P80 mod as it appeared to be a reasonably priced stealthy single 18650 device. It has performed perfectly well with only one complaint. Alright two as it had a silly light thing on either side but you can disable that so I'm not counting it. It absolutely devours batteries. Initially I thought it was my batteries getting old but found that no matter the age they were all lasting roughly the same amount of time. I experimented with the same battery and atty but on different mods and the vast majority seemed to last twice as long. I can only estimate but would say that I haven't vaped with any more frequency at one time or another so my only conclusion is that this mod just demands more power for whatever reason. I have entered the menu and I think I'm on the lowest settings for screen time etc. Menus aren't my strong point it must be said. Anybody else experienced anything similar with this mod or any others?