In this article, we’re going to explain how to safely change the button batteries in your Smart Motion sensor and your Smart Contact sensor. Before we get started, it’s important to remember that button batteries are very dangerous if ingested, and must be kept out of children's reach.

The app will notify you when your device's batteries are low and critically low. If you’ve not yet received this notification, there is no need to change the batteries just yet.


Before you get started, ensure that you have got the correct battery replacement, you’re looking for a 2450 3V cell battery for the Smart Motion sensor and a 2032 3V cell battery for the Contact Sensor. You will also need the hex pin that came with the device or another hard object such as a coin.

Replacing the batteries is nice and simple. Take the pin or coin in one hand and gently place the flat edge under the plastic battery removal tab on the device. The battery tab will click off when pressure is applied.

With dry hands, switch the old battery for the new one ensuring it's the same way up when inserted.

The Motion Sensor battery goes in with the writing facing towards the top of the device. The Contact Sensor battery goes in with the writing backing towards the bottom of the device.


Click the plastic battery cover back onto the device and ensure it’s clicked in place. Wait a couple minutes for the device to connect back to the app. You can optionally arm your home and trigger the device to confirm the battery is in correctly and sending signal to the app.


The last thing to consider is how to safely dispose of the used button battery. We’d recommend you take your batteries to your local recycling center on your next trip.
That's all! Your new battery should last for the next 12-18 months.

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