Its this, the voltage will drop due to cold even if the battery is still OK. I have a ZSE44 in my un-heated garage and it will report 1% all winter but keeps on working.
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Thought this might be interesting to see as well for people.
ZSE42 700 Leak Sensor (CR2032). About 15 months so far but it is holding out at this lower voltage. Need to do a test today and make sure it still works with the low battery.
ZSE11 Multisensor (2x CR123A). This thing is terrible with batteries. Need to just wire it to USB power.
ZSE40 Multisensor (1x CR123A) This one on the other hand works great
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Did you ever get around to testing LR?
The reason I ask, is I've been developing against a couple of ZSE44s in LR mode, and have seen rather unexpected battery results with LR. Yes, I'm triggering a lot of transmits with testing, but not a tremendous amount.
I started with the units in LR mode, using the batteries that came with the unit. In less than a week, the reported battery level dropped from 100% to below 20%, and the units completely stopped reporting shortly thereafter. Figuring that the batteries that came with the units were just bad, I swapped both out for new Energizer batteries, and had a repeat experience of the units dying in less than a week. Interestingly, all four used batteries test out on my Ansmann load tester as 70%.
When they drained the second time, I replaced the batteries, excluded the devices as LR, and re-included them as mesh. It's been almost a week since then, and the battery levels are still at 100%.
The units have been within 25 feet of the hub for both LR and mesh. In mesh mode they are able to directly connect to the hub using the standard antenna.
I know this isn't a methodical test, but it has definitely raised a question for me.
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