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Culture War Roundup for the week of September 16, 2024

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Short the battery

This won't do anything (other than causing a potential fire).

Explosives like that require an initial shock to actually detonate and overheating just sets them on fire (like it can set a regular battery).

If I had to hide an electronically ignited bomb in a battery, I would try to set it up so that a short ignites a primer which will ignite the explosive. Fill an electrical fuse with a primer which is volatile enough that the molten wire sets it off, perhaps?

The alternatives being that you have three leads on your battery (e.g. +, -, boom, where connecting boom with + will cause the explosion.), which is much more noticeable, or having another component which serves as a primer on the PCB near that battery. Of course, 'shorten the battery when receiving a particular message' is not a standard feature of most pagers, so you have to modify or swap the PCB anyhow, and putting the electronic ignition in there might be easier.

I concede that just because a battery is not rigged to explode on short it might still explode in other conditions.

Quite a lot of lipo have more than two leads, starting at a third thermistor wire, going up to per cell voltage leads, and eventually going to annoying Apple bullshit.

And even with two leads, if you're manufacturing a thousand battery-bombs, there's a lot of ways to do a one-wire (and ground) protocol to pass data to a microcontroller, which can easily be the size of a grain of rice. Or you could hard-short the battery leads on a battery without builtin overcurrent protections, and use it as a primary for your real explosives -- even a well-contained lipo fire is definitely hot enough to set off most thermal-ignite explosives.

Explosives like what? AFAIK the pager bombs were triggered by heat rather than shock.

PETN and any other similar explosives with enough power in such small size. At least PETN can be triggered by a spark which is simple enough to generate electronically (you just need a small transformer to produce high voltage and a very short spark gap).