My house has 20 sensors that open the door and motion sensors.
Time of use is too short, I have replaced after one month of use
In VietNam, 3usd/1pcs. It is 20x3=60usd. Thatโs big money 
What battery in what sensor ? Why are you worried ?
My house has 20 sensors that open the door and motion sensors.
Time of use is too short, I have replaced after one month of use
In VietNam, 3usd/1pcs CR2450. It is 20x3=60usd. Thatโs big money
I have one motion sensor that location seems to use more battery than the others. Overall I have not had to replace ALOT of batteries. It really depends on your systems and whats happening in your house.
Also WHICH battery possibly their is a mail order option that you could get them cheaper?? This has been discussed several times in the forum?
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As a newbie Iโm curious if ST can send a notification or alert when a battery level drops below a certain level. Is there a way to set this up?
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I donโt see ST do that
There are a few apps that can be set up to do it. Since one of the more recent updates, ST will show critical batteries right in the app. Look at your list of things and any with a low battery will have a flag next to them.
I met high level battery(67%), but my sensor do not work in the long time. 
Money to buy a new battery for a month more than my electric bill. 
Batteries should be lasting 6 months to a year except for door locks, they are thirsty.
You can also buy motion sensors that plug in to AC so no batteries.
Also, sensors with low batteries can get stuck reporting the true level. I have had sensors say 25% and completely stop working, they were actually so dead to tell me the truth.
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thanks @daven
Maybe this post could be a money saver?
