Change the battery every 12 months, even if the clock is still running. Weak batteries often cause the radio receiver to fail before the hands stop moving. If you'd like to dive deeper into this, let me know:
Upon first inserting batteries, the CH899 will typically enter "Signal Search Mode." ch899 chouchin radio controlled clock instructions free
(or WAVE) button for 3 seconds. The hands will reset to 12:00 and begin a fresh signal search. Hard Reset Change the battery every 12 months, even if
tlc-direct.co.uk/Technical/DataSheets/Clocks/CKATMC01.pdf">instruction manual for this specific movement? MSF Radio Controlled Wall Clock - TLC Electrical Supplies Change the battery every 12 months