I had one Kwikset 910 for about a year. That one runs on my back door, which is the most used lock in the house. The batteries were replaced in mid December and are reporting 80%. I’ve been getting good battery live, probably about 6 months up to this point. I will start tracking battery replacements at the next replacement cycle to see exactly what I’m getting. I recently added 3 more of these locks, which I purchased on eBay. These appeared to be new old stock and they are all working. They were installed around mid December with fresh batteries and are still at 90% reported battery.
Right after I added the three new locks I did notice that they would not all report status correctly at random times, but that seems to have diminished. When that happens usually sending a “lock” command to them all revives them.
Each door lock has a Leviton switch or dimmer (with the latest firmware) acting as a Z-Wave repeater within 2-6 feet of the lock. Although the locks were purchased a year apart they report the same firmware version in the IDE (ver:3.37 zwv:3.67 .)
I am running the standard “Z-Wave Lock” DH and “Smart Locks” app. I don’t seem to have the need for a custom DH and I like them running local. I’ve been using standard Duracell batteries from Costco, but I’m curious about the Lithium battery life. Maybe I will give those a try if I can find them locally.
BTW, I noticed that newer versions of the 910 are now available as Z-Wave Plus. Does anyone know if these are upgradable?
Cheers