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Turn an Ordinary 9-Volt Battery into a Secret Safe « MacGyverisms :: WonderHowTo
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Testing the 9V Battery Hack (or: Assault on Battery) – xkcd
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Use Cheap AA Batteries Instead of Expensive 9 Volt Batteries
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9v Battery hacks - Switch, LED, Motor, Fan - Beginner tutorial - YouTube
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Testing the 9V Battery Hack (or: Assault on Battery) – xkcd
9v Battery hacks, Switch, LED, Motor, Fan, Beginner Tutorial for students | Easy science experiments, Easy science, Battery hacks
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Testing the 9V Battery Hack (or: Assault on Battery) – xkcd
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9 Volt Battery Hack - YouTube
APSDev: 9V battery hack
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Testing the 9V Battery Hack (or: Assault on Battery) – xkcd
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Turn an Ordinary 9-Volt Battery into a Secret Safe « MacGyverisms :: WonderHowTo
CRAZY 9 Volt Battery Hack - YouTube
9V Battery Holder with DC Jack - Robotools
