That is not at all what I was saying. You have what I meant completely wrong. The voltage output from the outlet will differ from country to country. Look it up. Your pictures are nice, but you are actually not addressing what I was saying. You don't know that these were "ego chargers" - you're guessing here. The voltage through the actual outlet they are plugged into can differ in different countries.
No, I don't know for sure whether they're eGo or not. However, given their ubiquitousness and the appearance of the devices, it's a safe assumption to make. They look like eGo's. At any rate, both of these incidents happened in the United States, so the country to country variation does not apply. Those devices were supposed to be as shown in the labels I posted.
The car won't necessarily "fry" the charger. Car outlets are designed for plugging stuff in, and charging. They are commonly 12 volts and newer cars also have extra 5 volt outlets.
Question, again - which kind did the lady plug her ecig into?
Oh, yes they can fry the charger. The adapter (wall or car) has circuitry inside that is designed to limit the output voltage. For eGo charging systems, the adapter has circuitry to limit output to 5 volts and the charger itself has circuitry that limits output to 4.2,
given the specified input of 5v. That is what I was trying to show in the pictures.
If the adapter is plugged into something that exceeds the voltage of the specified input (120 - 240v AC for wall, 12-24v DC for car), there is a high likelihood that the circuitry limiting the output will be damaged. In a lot of cars, especially those with alternators that aren't working properly, you can get a LOT more than what's specified. That's how car batteries themselves can be fried and how electronics in the cabin can melt down.
If the adapter is then delivering something greater than 5v, then the circuitry in the charger can be damaged, meaning that potentially much more than the 4.2v are delivered to the battery. Thermal meltdown is the result. I don't know that this is what happened, but I'm betting that it is.
We don't know what these two ladies plugged their chargers into, but exploding batteries mean that somewhere between the cars' outlets and the batteries, at least one circuit got fried and too much current was delivered.
And, BOOM went the battery.