Assertion: electrical blasting cap | /r/CapableOf | wire to a battery clocks
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text: In most cases, detonators are blasting caps made of copper or aluminum cases filled with lead azide and PETN or RDX as a detonating charge Homemade bombs camouflaged in packages, suitcases, etc are usually initiated with an electrical blasting cap wired to a battery Clocks, mercury switches, and cars are also used as electrical sources