Easiest way to convert a mechanical pendulum clock to battery power while keeping the pendulum movement? : r/clocks

New clock owner. I got this app that tells me if level and BPM. Problem in a 24 hour period it is still about 4 min slow. Is there a correct bpm

Self Winding Clock Co.

Mechanical Clockwork Clocks Converted to Battery Movement

A standard wall clock is powered by one AA battery. If I replace the original hands with significantly heavier hands (say 10x or 100x heavier), would the battery run down sooner, or

Kieninger 2169-23-02 Cable Regulator Wall Clock, Triple Chimes

Quad Quartz Clock Movement with Pendulum and Tubular Chimes

Grandfather Clock Does Not Chime At Proper Time

How do grandfather clocks add energy to the pendulum without affecting the period? - Quora

Seiko battery wall clocks