Actually, no, it hasnt happened lots of times. The 2,053 reports is among multiple millions of e-cigarettes sold. . . And it wasnt explosions but reports of batteries that swelled, overheated, and a few that caught fire, worldwide. These reports are from the anti-vaping people who will hype anything. The fact is that I have switch several four pack-a-day cigarette smokers to e-cigarette vaping and everyone of them is now a non-smoker, non-vaper. Its the best way to stop the nicotine habit I know of. You just taper them off of the nicotine in the vaping solution until there is none at all and they stop on their own.
The vaping juice is a lot safer than tobacco, being made of natural food additives and flavorings, contrary to the hype the anti-vapers claims.
There have been several reports of these exploding like this over the years. I have seen them. Injuries to hands, mouths and face. This is not a one off incident.