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shiherlis's profile

Wednesday, October 12th, 2022 11:00 PM

Sudden Low Battery Warnings

One of my Entry Sensor batteries is low (the Base keeps announcing it). Fortunately, I have some CR-2032 Lithium 3V batteries on hand; however, the window the sensor is on is never opened. It is in my home office. Oddly, a sensor that never gets any use says it needs replacement when my front door (used multiple times per day) has no issues. I never had to change a single Entry Sensor Battery with SS2 (and neither did the person I gave it to). With one of the most significant Battery Life Expectancies (up to 10 years) and the lack of use, I am not sure why I suddenly have problems. Are other SS3 users experiencing this?

I am wondering if I will be wasting a battery. I am four years in, but it is not as though I have an ample supply of CR-2032s. Maybe I will remove and reinsert it before changing it.

Also, I could have sworn the Base Station warned me of the same thing with my Motion Sensor in the same room less than a week ago. But there is no message in the app (PC or phone) to know if I made a mistake (there was, but it is now gone). The only change in my office is a second battery backup UPS I added on September 24, 2022, that is closer to the sensors, but I have another one, have had it for a year and a half, and have had no issues (same brand and model). Besides, I do not think a UPS would cause interference – could it?

729 Messages

2 years ago

Unfortunately, I believe this is one of the questions lost in the "bumps." Is it possible that my UPS is causing this new issue? It seems highly unlikely, especially given that the two are the same model. I Googled the problem and saw nothing related to what I am experiencing. The original UPS is approximately 20 feet from the Motion and Entry Sensor, while the new one is about six feet.

Community Admin


5.5K Messages

2 years ago

HI @shiherlis ,

I don't see how an external UPS should be able to affect how the Base Station is interpreting signals from the Sensors. I'm assuming that it doesn't send out any wireless signals itself. So unless the sensor was right on it, I'm not sure it it's the problem.

It's also odd that a sensor would run low on battery first, when it's rarely used. The Keypad for example is always talking to the Base Station, and may even send 'pings' multiple times to re-establish the connection - which is why interference and range issues might make the battery run out faster.

But the sensors just send simple check-ins regularly (on top of the signals for 'open' and 'closed'). And that doesn't use a lot of energy at all, which is how Entry Sensors can last for so long.

I'm thinking maybe the Base Station somehow is receiving or interpreting incorrect error signals. When was the last time you did a Base Station Reset? Clearing out the temporary memory might fix it.

Also, another firmware update is coming up soon (of course I'll post about it when it comes out). The stability fixes and optimizations in that update might be able to help.

729 Messages


I did a Base Station reset, which did not solve the issue. I did not want to replace the battery, as it genuinely seemed there should be no need (I also need help due to my health, which would not be a problem otherwise). My presumption is a faulty sensor, but I will replace the battery in the interim. The voice prompts from the Base Station are getting to be too much. In the meantime, I will see if I can clear the announcement (it is unsafe for others to hear).




So I figured out how to clear the announcement until I can get some help with the battery replacement (for those that find themselves in a similar situation in the future, you do so at the Keypad). That shows how reliable SimpliSafe (SS2 and SS3) have been – the fact that I had no idea how to do it after ten years of being a customer. I hope these new issues go away. Having a security system I could set up and not worry about is something I suppose I took for granted.

Edit 2:


I went ahead and replaced the battery. I should not have had to, but better safe than sorry. I nearly fell three times but had no other choice (i.e., no one to assist). The battery was a Duracell DL2032. I replaced it with Energizer. Again, no other Entry Sensors (and ones that I regularly open) have given a low battery warning.


1 Message

9 months ago

Check to see if the cold is making sensor think battery is low, i rarely use the one that gives me the most trouble as window frames and steel doors have no insulation

1 Message

8 months ago

I'm having the same issue with a low battery warning for a sensor. I removed the lithium battery and tested it with a multimeter and the battery is fully charged and operational. Conclusion: it must be the sensor that's malfunctioning. I'm going to see if Simply Safe can send me a replacement for free.

Community Admin


2.9K Messages

@tuningcourse​ If you haven't tried this already, I would recommend resetting the Base Station just to ensure that it isn't relying incorrect error signals. This can be done by taking the following steps:

  1. Unplug the power cord from the Base Station, and use a Phillips Head screwdriver to remove the screw below the plug
  2. Remove the bottom cover and remove one battery from the Base Station
  3. Wait 30 seconds
  4. Reassemble the Base Station by inserting the battery, cover, and the power cord
  5. When powered up after the reset, the Base Station will say "Welcome to SimpliSafe"

If that does not help, our Support team can always help troubleshoot this sensor with you live, and send out a new one if needed.

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