#1: How does a cartomizer get burnt? I had one on my diamond manual the other day and it was a relatively new carto so I know it wasn't used up yet. It tasted great one minute and the next I took a puff and it tasted horrible! Like the taste of lighting the wrong end of an analog. I've read about burning cartos but I had assumed that it happened when you used one for too long do there was no liquid left in it. Can anyone tell me how this happened on a new prefilled cart? Just wanna know if I did something wrong or if it was a bad cart etc....
#2: I was also wondering about charging batteries. Like if I'm going on a trip and I charge up several batts at home, do they hold their charge when I'm not using them? Or do they start to run down as soon as they come off the charger? I know they would obviously run down faster if they're being used but just wanna know if charging a bunch all at once and using them one by one until they die is a good method for when I'm traveling.