9V Battery Survival Safety Cap
cults3d
Human: 9-volt batteries prove to be incredibly useful items for inclusion in hiking, camping, and survival gear. Touching one to a wad of steel wool instantly generates a hot starter fire. However, you must protect those exposed terminals from contact with anything that might short out and drain the battery. This original cap design effectively does just that. The small enclosure on the inside further isolates and protects the positive terminal. Applying a small amount of caulk around the base of the cap renders it totally waterproofed as well.
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