Indeed! Now, after 3 years, the battery in my soap dispenser can no longer be charged. I still do not have a solution

Hello everyone, I sent the device back after a few weeks because the battery did not last long. I think there is a problem with the battery on this device.

My device has also been in use for about 3 years and the battery does not (yet) show any weakness. I have not been able to find any information on the web as to whether and how the battery can be replaced.