Please continue your research. You have missed quite a few reports/news stories.
E-cig exploded under Desk of worker - Wall charging
E-cig Launched like Rocket - Charging on counter behind Pub Bar
It doesn't matter WHERE the power is coming from, the CHARGER is the issue. Some are CRAP!
Thanks for the info. I couldn't find the first one, but the second one about the pub I found said they used an iPad charger to plug the ego USB into. An iPad charger!! That puts out 12 watts!! What did they think was going to happen? A rapid charge?
But you are right, the charger is the issue. It should be able to regulate the power going into the ecig and not rely on the power supply (i.e wall charger, laptop).