Something really, really bad has to happen to cause a li-on battery explode. Let me put it this way: How long have you had a cell phone? Digital camera? Digital camcorder? iPod? Lap top? Chances are better than 99% they have li-on batteries. Any of them exploded?
If it was common with eGo batteries there wouldn't be any eGo batteries. If you have seen anyone reporting an eGo problem can you please post a link? I would like to see it.]
Here you go with links
http://www.e-cigarette-forum.com/forum/canada-forum/160267-hot-battery.html
http://www.e-cigarette-forum.com/forum/ego-type-models/217880-exploding-ego-t-battery.html
http://www.e-cigarette-forum.com/forum/vapor4life/144668-careful-passthroughs.html
http://www.e-cigarette-forum.com/forum/new-members-forum/190146-pictures-serious-battery-failure-imr-18650-a.html
I was riding in a car one day w/the driver from Toyota dealership. His cell phone was in his pants pocket. All of a sudden his leg started getting warm, by the time he got it out it had burned his leg.
Another friend said his cell phone got hot when talking a couple minutes, I tried it out and damn near burned my cheek. Both were faulty IMO - then again they said the Titanic wouldn't sink too.
All batteries should be handled w/respect. I would never charge a battery - be it cell phone, lap top or e-cig mod when not in attendance. Ive seen an automatic Smoketip battery come on when attaching the filter.
To end this story - I myself have experienced a thermal runaway in a mod. - Switch was apparently stuck on. Did that keep me from vaping - no. I remove all batteries from mods when I'm not using them and only use all mechanical mods now. I still remove the batteries for just in case.