I bought a VV ego a month or so ago, and it has worked fine, last night I let a friend of mine borrow it while we were out, and when I got home I put it on the charger, about 30 mins later I come back to check on it and I can smell a burning smell, and I unplugged it. I noticed the USB wall plug thing was hot, so I chucked it right away, I also noticed I had tried to charge it with the wrong charger from what I usually use, I think its an SLB 510 charger, but it looks just like an ego charger, and the only way to tell is by reading the writing on the label, I chucked it to, I don't have those Batts anyways. The battery wasn't hot, and it seems to work fine, but I don't know that much about this stuff. Still learning. So...should I just chuck the battery or is it a nonissue?