Low Battery Warning for Smoke Alarms

Hi Jonny Gogo,

In this regard, the Smoke Detector and Carbon Monoxide Detector both work almost the same as the other components (like the Entry Sensors). To further save battery power, the components do not constantly poll battery level, so there's no way to check that through the app.
But as soon as any sensor's battery goes below a low threshold, a signal will be sent to your Timeline. So if you have Smart Alerts enabled, you'll be notified right away. And you'll also be able to check on the Devices section of the app and webapp for an overview of all sensors.

The one difference about the Smoke Detector and Carbon Monoxide Detector is that they'll also chirp and show a flashing yellow light.

- Johnny M.
SimpliSafe Home Security

The one difference about the Smoke Detector and Carbon Monoxide Detector is that they'll also chirp and show a flashing yellow light.

And the murphy's law of smoke detectors or CO detectors of any brand, made and sold by anyone anywhere is that this chirp will start at 3AM when you're dead asleep. :)