If your clock uses "AA" or "AAA" batteries:

**When choosing the proper batteries for your clock, please consider the following information: There are many brands of alkaline batteries available on the market today, but there are several brands out there that just don’t perform well in clocks. The most ideal battery is what is called a "Low Drain" AA battery.

Several batteries have extra plastic coating on the negative end of the battery (and you can't see it by looking at the end of battery), which can cause clocks to malfunction or not work properly at all. Alkaline batteries are the only type of battery that should be used in clocks. Lithium powered or re-chargeable batteries will cause your clock to malfunction, or not function at all. Lithium and rechargeable batteries are meant for “high-drain” devices, such as digital cameras, etc. Alkaline batteries are best used in “low-drain” devices, which includes clock movements.

WE HAVE FOUND that an inexpensive brand and not some of the name-brands are now the best to use with clocks unless the name-brand battery is specifically designed as "Low Drain" on the outside of the package.

We have bought off-brands online and also from our local hardware/home improvements stores. Here is a link to a battery we have had great luck with on Amazon:

https://www.amazon.com/VONIKO-Batteries-Alkaline-Long-Lasting-Leakproof/dp/B086Y8NPNC?ref_=ast_sto_dp&th=1

Corrosion is also an issue. Remove the battery and scrape the metal contacts inside the battery well. If you see corrosion, then clean it with a dry paste of baking soda and water and clean thoroughly.