Yeah, this is what can happen when you don't use the appropriate charger for your battery:
"
E-cigarette was plugged into an iPad charger on the bar when it blew up."
In common English, use only the charger that is recommended for the battery. And use the appropriate USB/wall adaptor.
The news story didn't say what type of e-cig it was. Regardless, as stated above don't attempt to mix and match
batteries, chargers, or USB/wall adaptors.


Ego charger and USB/wall adaptor
These are lithium ion or li po
batteries. They are a volatile (as in flamable) chemistry should they short circuit. It is rare, but it can happen that a battery can go into thermal runaway and go into meltdown mode, releasing very hot gas and flames with force.
Statistically, most battery incidences occur while charging. Charge your
batteries on a flame resistant surface. Stove top, marble countertop, baking pan or pyrex dish. Don't charge your batteries when not in the house to monitor them. Use a USB/wall adaptor, not a computer USB port or an automobile USB port.