I've just bought a crystal clear vapour works really well, I charged it up and was told to wait till the light turns green and then it will be fully charged after about 4 hrs the light was stiil red picked it up and the battery was extremely hot, attached it back to my ce4 and started smoking it but was getting hardly any vapour, took it back and the guy happily exchanged it and said I over charged it. Didn't think this was possible? and I'm worried about charging my new battery now. Has anyone else had problems with charging? The battery is an eGo-k.