Zooz ZSE70 Eating Batteries?

Hardware
1

I’ve had a Zooz ZSE70 outdoor motion sensor in place since September 2025. Recently, it seems as though it’s eating batteries. I’ve replaced them twice in the last month and both times the battery level has gone from 100% to less than 20% in a week.

The device claims to be sleeping and is set to wake up at the default interval of 4 hours. As far as I can see, all the other settings are set to their defaults.

Is it the cold weather that is throwing things off, or is something else happening. Thanks for any advice.

One other thing - I notice that once the battery level gets below 20%, the device stops working as well. Here for example are the illuminance levels for the past few days - it was working on the 2nd of February, but not since then…

image
image1466×552 29.8 KB

And temperature:

image
image1482×566 21.4 KB

2

Your graph presents that the interval is much shorter.

3

Hmm, I have this:

image
image1189×199 9.93 KB

But also this:

image
image1220×1136 110 KB

Checking every 30 seconds seems excessive - I’ve not set this myself - perhaps turn it down?

4

I don’t have this device.
Even the default values look excessive to me,like brightness measurement interval 10s(default).
Also the brightness change report interval 50lux sounds stupid, if you have clouds moving over clear sky it can trigger continuously.

5

I put everything to the default settings yesterday and replaced the batteries. A day later, and the battery level has dropped from 100% to 76%. Something is definitely wrong, but I can’t see what.