Wow…glad I found this post (and this is my first HA post :-)…just switched over from Homekit/Homebridge to HA a few weeks ago and loving it! Have about 70 devices–37 of which are zigbee devices from Ikea, Philips and Aqara).
So was super excited to get the Vallhorns as I thought these would be available starting January and ran into the same issue for 5 of the 6 I got. After seeing this post, I’ve tried a bunch of batteries and found that switching to the Amazon Basics rechargeable has resulted in zero falso positives (over 1 evening, mind you) for 2 sensors which were regularly triggering false positives. I have a Battery Daddy caddy (lol) with tester and it “seems” like the batteries that have the highest voltage like the Kirkland AAA+ seem to generate the most consistent false positives. This is only with one evening of testing and swapping out batteries in a few of the sensors. The Nanfu generics seem to do the best for non rechargeable batties but I still had a set that generated false positives so I switched them out immediately with the Amazon Basic rechargeables.
Thank you all for the help and I’ll post updates if it helps. I am concerned in the long run on reliability but let’s see how these go. I mean $9 for a motion sensor that can do indoor / outdoor is hard to pass up and makes me want to outfit every room. I have 5 Hue Outdoor motion sensors and those have been rock solid once I allowed the ZHA unsecure rejoin.
