The soap dispenser is powered by batteries. More specific information about the type of batteries (e.g. alkaline) is not included in the data provided, but it is often recommended to use alkaline batteries as they provide reliable performance. Rechargeable batteries are not always the best choice as they may not provide enough voltage to power the pump mechanism effectively.

yes, that's what I do...

I operate the device with batteries. But they last forever. It is therefore not worthwhile for me to switch to rechargeable batteries.