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Your Next Gym Lock is from the Future: Masterlock dialSpeed Electronic Combination Lock | Primer
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GastroWstlnd, Jonathan003, johnetrent and 1 other like this

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1 comment

  • JeffHaun 3 years, 7 months ago

    This needs a crank to charge up a capacitor for unlocking when the battery dies. Even a pull cord that spins a small electric motor could work and still fit a small design.