i notice sometimes when a battery dies and i go to switch and put the new battery on, the carto can sometimes taste a bit burnt. when that happens i would put some more juice in and it would go away but on a few cartos i have it doesnt seem to i think. maybe im just paranoid lol. i dont want to throw out a carto if its not really bad. do any of u guys have this problem when switching batteries? have u ever been able to fix it by adding juice? does the burnt taste sorta hurt ur throat when ur vaping it? sorry im a bit of a noob . still trying to figure all this out