I've been away from vaping and a lot of my hardware is aging. I just charged an ego 650mah battery. It seemed fine when I took it out of the charger but the second I screwed in the cartomizer (yes, I still have those) it started making that hissing noise it does when you are drawing on it. I swear, I did not touch the button on the side either and it's not automatic. Having read many stories about exploding batteries, I put it outside. Should I toss this thing? Also, should batteries be warm when you remove them from an AC charger? These are 808 batteries BTW.