[burke]

Lithium ion batteries in devices are sandwiched layers enclosed in a kind of 'pouch', right? So what if you manufactured one of these that looked identical to the normal battery, but only had half a battery inside, and the rest of it was plastic explosive. Maybe put a tiny chip in there that, when a particular pattern of current draw happens, fires a detonator. Then, some firmware hack in the device proper that responds to some event and actuates that current draw pattern. It wouldn't even look suspicious if you opened it up.

[bonestamp2]

That's an interesting idea, and it wouldn't even need a firmware hack... a real time clock circuit with a specific date/time to detonate would be simpler and easier to coordinate simultaneous detonation.

[andrewshadura]

Pagers typically ran off regular AA batteries, not Li-Ion stuff.