Your only recourse would be to buy a new movement as these are not serviceable.
How to fix a battery operated pendulum wall clock.
Step 1 open the battery compartment.
How to troubleshoot wall clocks.
Use a screwdriver to press in the clip or unscrew it 1 x research sourcestep 2 remove the old battery.
I have heard that quartz clocks run best with duracell copper top batteries.
Remove any loose corrosion from the battery.
This should release it from the compartment.
They also operate independently of the actual clock movement and have no effect on it.
They are all operated by an electro magnet that gives a pulse to a magnet on the pendulum arm which gives the pendulum a very natural swinging motion.
You should hear a ticking sound.
Swing the pendulum on the inside of the clock if it has a pendulum.
The battery is accessible from the backside of the clock.
The battery compartment can be found on the back of the clock.
Inspect the battery compartment for corrosion.
I d guess that the pendulum operating mechanism has failed.
Use your fingers to pry up one end of the battery.
Dispose of the battery 2 x research sourcestep 3 clean the terminals.
This is a typical problem that clock owners overlook and repairman find in seconds of laying eyes on the face of the piece.
Open the battery compartment with your fingertips and nails or use a screwdriver to open it.
Open the door and bring the pendulum all the way to the side then let.
The small black box known as the movement will house the battery.
Insert a screw driver or blade into the case notch at the side of the back cover and prise open the back cover.
That there is some connection problem with regular batteries and the duracell copper tops fix a lot of problems such as dead pendulum.
However i have 2 clocks with this problem and the duracell did not fix the problem.
The clock was never a wind up.
Simply start the pendulum swinging and move the case gently until the tic and toc are in good balance.
All of our battery operated pendulum movements have several things in common.
However the pendulum mechanism on these clocks is purely cosmetic and has nothing to do with the timekeeping.
Move the plate sideways and remove the battery.
Put on gloves and pull the batteries out with tweezers or tongs.
If not there may be internal damage.
Wind the clock if it has stopped running.
Alternatively pry the batteries out by.
I m afraid there are no experts on battery clocks on this forum.