Advice on a Z-Wave Smoke Detector

Well, and this is unfortunately the point which will probably make you think different in a few months or even weeks. I have the device since 1,5 years and have to change the batteries everytime after about 6 months. Towards my mind this is too short.
Addionally - and this makes it really worse - you can stop looking at your 100% battery level as it is simply not true. The device will show this all the time and then suddenly drop to 0. That’s it.

See also
Which Smoke Detector (Groups, Notification, etc):