Battery drain Fibaro Smoke Sensor 2

Hi all,

Since February this year, I have 3 Fibaro Smoke Sensor 2’s installed in my house. One in the kitchen, in the hall and the laundry room. The sensor in the kitchen is still using it’s original battery, currently at 65%. In the laundry room, I already had to replace the battery 3 times. And it is already low on power, I replaced the battery 11 days ago. In the hall, the battery has been replaced only once. On September 30th, I replaced the battery for a new one. On October 4th, it had drained to 5% which it still is at this moment.

The settings of all sensors is exactly the same. Could anybody help me out? Thanks! See chart below for the battery usage and the sensor settings.

Please have a look into Homey Developer (, then Z-Wave and then the Rx values of the Smoke Sensors.
Do the values differ significantly from each other?
Maybe the sensors with the high battery consumption have a bad Z-Wave reception and therefore send more often (more Rx values).
Here are some more information regarding the Rx values.

Thanks for your input. It could be possible that the smoke sensor in this particular room has a bad reception. Luckily, i’ve bought some Neo Coolcam smart plugs to monitor the washing machine and dryer. They will repeat the Z-wave signal in this room. Attached are the values of the Z-wave products I use.

Was the screenshot taken before or after installing the SmartPlugs? If I interpret this correctly, the signal from the smoke sensor is forwarded via a spot (perhaps also a SmartPlug, but not from the washing machine or dryer).
And I am wondering that many devices rarely sent data and battery-powered devices did not.
Did you restart your Homey?

If you use more SmartPlugs now, the Z-Wave Mesh will need some time to heal itself. You can also speed this up by clicking on the 3 points at the back and selecting Heal. For this to work on battery powered devices, you need to wake them up.

Otherwise I would now observe whether the battery still becomes so fast empty, possibly also a hardware error is present.

Thanks for your help! The screenshot above was taken before installing the two new smart plugs. Meanwhile, 7 days ago i putted a new battery in the ‘Rookmelder overloop’ (smoke detector), and has already drained untill 5%… Expensive hobby :wink: An hour ago, I healed the smoke detectors and rebooted my Homey. Hopefully it will work this time. They do use another Z-wave route now…

As it looks, the smoke sensor ID13 has not yet chosen another route. But as already written, this may take some time. Or you can use the Heal function as already mentioned.

Another possibility to reduce the battery consumption is to change the so-called “Wakeup Interval”. In the screenshot you will find some information about this, also why it can be that the battery consumption can be so high (failed communication):

If you want to change the wakeup interval, you have to wake up the smoke sensor manually after adjusting the times in the app under “Advanced Settings”, so that the changed data can be transmitted.

If you still have a significantly high battery consumption despite these actions, you should contact Fibaro Support. The smoke sensor may also be defective.

First try to remove it from Homey and then add it back. You can place it closer to Homey to test if battery will drain the same pace. If it will, its most probably faulty device. I have this smoke sensor and battery last 1,5 year (disabled temperature reporting).