Things voldemort should have made into horcruxes:
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A penny, he then should have gave that penny to a stranger and told them to pass it on , the result would be Harry Potter never being able to find the penny.
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His underwear , who wants to have to take someone’s underwear off of them?!
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A dead battery, who would suspect that?
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Lily and James’ tombstone. Could harry destroy his parents graves?
I think…I’m pretty sure you’re thinking of Portkeys. Horcruxes have to be important to the maker, not just random things.