Question about Philips Hue Dimmer Switch 2021

I assume that it works and is not defective.
The standard battery has lasted quite a while in this type of light switch.
I feel like I change a battery every few years.

A test would be appropriate.

There is approx. 16% more voltage compared to a battery.
With the LIR, the cut-off discharge voltage is reached at 3.0 volts.
I'm just wondering how it behaves when it reaches 3.2 volts and below. Not that the battery will be damaged.
A fresh CR has around 3.2 volts.
This is already discharged at 2.8 volts.