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The reason we don’t see exploding battery attacks more often is not because it’s technically hard, it’s because the erosion of public trust in everyday things isn’t worth it.
(www.bunniestudios.com)
edit: after 20 comments, i'm adding a post description here, since most of the commenters so far appear not to be reading the article:
This is about how surprisingly cheap it is (eg $15,000) to buy a complete production line to be able to manufacture batteries with a layer of nearly-undetectable explosives inside of them, which can be triggered by off-the-shelf devices with only their firmware modified.
Yes that's correct high explosives require a starter explosive. However this starter explosive would also have to be incorporated into the device and the starter explosive is triggered by a spark or a fire. So throwing it in a fire would still work as a test you'd just have to make sure it totally melted before concluding anything.
They don't necessarily require a starter explosive, certain types do of course. It's more about overcoming the initial energy required, for example the arc from an electric arc lighter could probably overcome that requirement in a lot of scenarios.
The type of explosive used in this is not a high explosive. If put in a fire it would have exploded