I have had 2 of the SmartThings MutliSensors report 66% battery and that everything was OK. But the batteries are dead <0.1V. I only noticed when looking at the logs and noticed they last reported any status 2 months ago. They died reading 66% battery and closed status.
I keep reading about people who have sensors die at <66%. I’ve been keeping tabs on mine for this very reason.
I just checked them again tonight and they are at 50%, 55%, and 66%. All of them are reporting open/close/temp correctly.
I have three, all of which have stalled at 88% (for the last month or so). Yet they continue to report home, and they continue to display temperatures that vary over time and differ between each device (leading me to believe they are still working).
I’ve had a couple of mine die spontaneously but, the very first one I purchased is still going strong at 89% battery. This door doesn’t get used as often but, it still reports frequent temperature changes. I’m hoping there was just a bad batch of batteries.
FYI,
the Smartsense multisensor with CR2450 (might be Centralite model# 3321-S), with battery reading 0% for months, but still reporting temperature, has caused my Android phone-app to spin-wait-forever for the “Room” (KITCHEN) which contains that sensor, and also for the “Things” page.
now I moved that sensor to its own Room (POISONED), so I can open KITCHEN but still cannot open THINGS.
I opened a service ticket but I haven’t been contacted.
@csuk I have 2 of the coin battery ST multi sensors both showing 66% life left. One multi is clearly dead as it has not posted anything for days. The other is used on a garage door but not longer is showing anything except always closed, However it is still reporting temperature at the regular interval. I have some new batteries coming to the house tomorrow, but am curious if the second multi is a battery issue as temp still reports fine. I have also opened a support ticket over the weekend, but have not heard back on that yet. Any thoughts here? Hopefully it just takes a fresh battery. We will see 
I worked with David from ST support on chat. He had me do a reset on my ST multi that was only showing temp and that fixed it right up. Below are the steps for anyone else seeing this issue. Now to hopefully fix my other ST multi with a new battery…
Zigbee Device Repair (will not lose settings or Smartapps device is linked with)
Bring the device within 5ft of the hub
Remove the Cover
Carefully Remove Battery
Put the hub into “Join mode” from the SmartThings Mobile App
Tap My Home
Tap Things
Tap Connect New device
Screen will now display "I’m looking for your new things"
Press and hold down the white button
Reinsert Battery while holding down button
Once battery has been reinserted the LED light should flash, when it does release the button
Once released the device will now pair to the hub
The Mobile App will not indicate a new device has been found, because all we have done is reconnect a device that is already listed on your account.
Just want to add that I edit a copy of the smartthings device handler and add a heartbeat event every time the device talks back to the hub. Then use simple device viewer to monitor and report any device that does not report events for over 2 hours. Using this I’ve not had any sensors fall asleep without me picking up quickly.
I do this for all of my devices.
Want to share 
? I like that idea since clearly we cannot rely on battery % checking apps/ rules.
Very simple change but I’ve put it here if you want to use it. Especially useful for sensors which have very little visible activity. Eventually this change will be obsolete and not necessary once we are able to access the healthcheck feature in the app. Until then it’s essential in my view to obtain maximum benefit from the monitoring smartapps.
Decided to check all 6 of my multisensors and realized 3 of them to be unresponsive. One being on my front door. I took the cover off and rolled the coin battery around a bit and it became responsive again. The two others, on my porch windows, were unsuccessful. I was able to repair one of them, the other is completely dead. I have a ticket in with support for a resolution. But this is completely unacceptable. We should be notified when a sensor is about to die or dead. We should not have to constantly check up on these every day or so. What’s the point?
Does anybody have a solid alternative for a door/window sensor that sends you alerts about battery dying or dead? I would like to replace my multisensors.
@LennDel I am running [RELEASE] Configurable Low Battery Notification and Device Monitoring from @rboy pay site http://smartthings.rboyapps.com $25/yr or $35/lifetime. His DH/apps are well worth the money!
Also, since Im actively working my ST daily I check the web IDE devices listing to see if and devices havent checked in lately.
@Awestun This sounds interesting… I just private messaged you for more info.
I would simply use @krlaframboise’s awesome Simple Device Viewer to keep all your devices in check. It can also send battery notifications and alert you when devices are no longer active.
@a4refillpad yep, that is another one that I use, but the problem that I run into that one is that i have over 60+ devices and it times out before the DH can poll and get a response back from all of the devices. This is a ST time out problem and not the DH itself.
I built in a workaround for that problem in version 2.2.3 so you shouldn’t be seeing timeouts anymore.
The SmartApp starts checking and if it can’t finish within 15 seconds it stops where it is and picks up from where it left off 1 minute later.
Once it makes it through all the devices it goes back to running at the usual scheduled interval.
@krlaframboise When I pulled the newest version down from github it was 2.3
That’s correct, the latest version is 2.3.0 and it was released last night. I mentioned version 2.2.3 because it was released back in September and should have fixed those timeout errors.
Let me know if you’re still seeing timeouts with the latest version.
Just to clarify, this SmartApp doesn’t poll the devices to get the last event time, it retrieves it from the device events table of the database.
The SmartApp has an optional “poll” feature which executes the poll command of the supported devices, but that feature should only be for devices that don’t checkin on their own.
@krlaframboise I see the “Unable to load the states…” message now with 3 listings under it. Should I let it on the screen for 1 min or go back to the main and run last states again and itll add to the previous?
also, now it is showing my sirens in switches even though they are added just to sirens.
This problem has been fixed in version 2.3.1
The “Choose Devices” page lists all the capabilities to ensure you’ll be able to add all your devices, but which field you choose the device from has no affect on which page it appears on. (lights are the only exception)
All devices that support the switch capability will appear on the Switches page. If you don’t want your sirens to appear on the switches page, go into the “Display Settings” screen and exclude them for that capability.
I know that seems kind of strange, but excluding a device that appears somewhere you don’t want it is a lot easier than selecting every device multiple times to get them on all the screens you do want them.