To ensure optimal operation of your SwissKubik watch winder, battery replacement must be carried out carefully. Follow these simple steps:Access to the battery compartment: Use a coin change to unscrew the battery cover screw. Remove it gently to access the batteries.Removing and installing new batteries: Remove the used batteries. Then place the two new batteries (Type C 1.5 volt, we recommend the use of the Procell Duracell model due to its quality) in the housings provided for this purpose, taking great care to respect the polarities (+/-). This is crucial to avoid any damage to your rotating display case.Closing the battery compartment: Put the cover back on the battery compartment and tighten the screw with a coin to secure the battery cover.By following these instructions you will ensure that your watch winder works reliably and securely. If you experience any difficulties or need additional assistance, please review our troubleshooting guide or contact our customer service.