You could get a new battery from a known good source (or light a couple on fire to make sure they’re not explosive). It should be relatively easy to check the rest of the components for anything near a dangerous amount of explosive, and the body can be replaced with a custom one and/or subjected to the fire test.
Even a fire test may not produce accurate results (see C4). Better to not have distinct supply lines from the civilian population you’re already hiding in.
They going to tear open the battery while they are at it? It’s not like there’s going to be a small lump labeled “RDX” with wires sticking out of it.
While they’re at it, why not incorporate the explosive into the body of the device? Has no one else seen Up in Smoke?
You could get a new battery from a known good source (or light a couple on fire to make sure they’re not explosive). It should be relatively easy to check the rest of the components for anything near a dangerous amount of explosive, and the body can be replaced with a custom one and/or subjected to the fire test.
Even a fire test may not produce accurate results (see C4). Better to not have distinct supply lines from the civilian population you’re already hiding in.