I can confirm that the multipurpose sensory has been observed to die at 66%… which sucks. It’s on a list of things we’d like to improve, and it’s something that I will be investigating over the next couple of months. However, we were able to get about a million open and close events in testing before the battery died.
We’ve changed manufacturers for the multis and we definitely need to re-test the new ones. I’d also like to see the voltage lookup table improved on the current gen multi’s, but the ZigBee spec only allows checking of 100 mV intervals. Regardless, the battery reporting definitely sucks right now and we’d all like to see it improved.
The devices should still go 6 - 12 months on a battery. It’s possible that the battery that came with the device was subpar, but if you guys are consistently having trouble with the battery dying too quickly then I’m sure support will replace it for you.
Sorry I couldn’t make this post happier, but this is something that definitely has my attention.