So from a myth I read online somewhere I found out that a laptop battery, 8 out of 10 times uses 18650's. I "found" a laptop battery (don't ask questions) - and opened it. Now I know one or two of these batteries are probably end of life. I got 6 out of one battery - so im not to bothered loosing one or two - I just want to know if these would be safe to vape.