In this article you will find information on our discontinued Roost 9V Smart Battery. This product can no longer be purchased from our online store.

Why can’t I purchase a complete smart battery anymore? 

Due to evolving technology in 10-year sealed residential smoke alarms, Roost has recently discontinued the 9-volt Smart Battery. Our recommendation would be to use a standard 9-volt battery in your smoke alarm or, we would strongly encourage you to consider the benefit of a new smoke alarm with updated features and technology. Note that the NFPA as well as manufacturers recommend that all smoke alarms should be replaced every 10 years to ensure proper operation.

Will my current active Smart Batteries continue to function? 

As long as your devices are active and currently checking in with the cloud every 24 hours they will continue to function until the battery power level depletes. We strongly encourage you to replace your batteries with a standard 9V as soon as you are notified that the battery level is low. If you have any concerns or questions about your active devices, please reach out by email to and we will be happy to help you.

Will the warranty on my current devices be honoured if something goes wrong? 

We will honour any warranties where we can – as there is no remaining stock of the Smart Battery we will not be able to offer replacements but if you purchased these devices within a year and we have helped troubleshoot with no resolution, we would be happy to process a full refund for you.

Setting up for the first time

If you have a Smart Battery that you are trying to set up for the first time, unfortunately it will not be able to communicate with the Roost cloud and will no longer function. Set up will only be successful if the device has been set up previously and checked in recently. If you purchased it within the year directly from Roost, please reach out to support for further assistance.

Testing your Smart Battery

To test your Smart Battery, press and hold the test button on your smoke alarm so that the alarm sounds for at least 10 seconds. You should receive a notification from your Roost app. If you do not, please see the below sections for low battery and missed check ins. If these sections do not help you resolve this issue, please reach out to support for further assistance.

Low battery

The Roost Smart Battery will typically last up to 3-5 years in most smoke and carbon monoxide alarms. Replacement battery packs for the Smart Battery are no longer available to purchase from our online store. If you have an active Smart Battery and already have a replacement battery pack available, you can use it with your existing Smart Battery when the battery level becomes low. There is no need to set up your device again when replacing the battery pack – simply remove the smart module (the small rectangular end piece) from the old battery pack and attach it to the new one. In a day or 2 you will see the updated battery level reflected in your app.

Missed check in

If your Smart Battery shows a last check in date over 24 hours ago in your app, or you have received an email letting you know that it has not been able to check in recently, there are a couple of possible causes for this –

  • Weak Wi-Fi signal strength – you can test this by bringing the device close to your router and resetting it (instructions below). Leave it there for a day or 2 to allow it to force a check in. If this does not allow your device to begin checking in again, please reach out to support for further assistance.
  • Low battery power level – as mentioned above, unfortunately replacement battery packs for the Smart Battery are no longer available for purchase. You can recycle your Smart Battery in line with local regulations.


To reset your Smart Battery, remove the smart module (small rectangular end piece) from the battery pack, wait 10 seconds, then replace it. You should hear a single beep and see a flashing LED on the long side of the device. If you do not hear the beep or see the flashing LED, please reach out to support for further assistance.

Disposing of my Smart Battery

If your Smart Battery battery level becomes low you can dispose of it by recycling it in the same way that you would a standard 9V battery.

Smoke Alarms unsuitable to use my Smart Battery in

The Smart 9V Battery can be used in most standard smoke or smoke/CO alarms. However, there are some smoke alarms that we do not recommend using your Smart Battery in – i.e. Kidde i12060, Kidde KN-COSM-1B, Kidde KN-COPE-1C, FireX Kidde i4618, First Alert CO400, First Alert 7020B, BRK SC6120B or FireAngel SB1 alarms, and any alarms that also have an LED.

It is recommended to replace your smoke alarm every 10 years.


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