TIP! Do not use a coin! A coin doesn’t get a grip and slips out, and you might damage the Aqara sensor.
The easiest way to replace the battery If you stick it to the wall. And then turn counter-clockwise.
You can now replace the battery with a new one.
The battery should work for 2 years almost. Only if you place this sensor in a bathroom it works for 1.5 years.