SmartThings Multipurpose Battery (How to Replace and More)


You’ll need to maintain your smart home after the honeymoon phase is over.

One of these tasks is to change the batteries in your smart devices.

SmartThings Multipurpose Sensor Batteries

SmartThings Multipurpose Sensor only requires one CR-2450 battery. It should be replaced approximately every 6-12months (mine died after 9 month). It takes only 2 minutes to replace it. To force the casing off, you will need a small flat-head screwdriver with a 3/32″ head.

Contents hide

1 SmartThings Multipurpose Battery

1.1 How do you replace the battery

1.2 What Multipurpose Sensor do you have?

1.3 Type of battery

1.4 Life expectancy

Use-cases for Multipurpose Sensors

1.5.1 Doors

1.5.2 Window

1.5.3 Washer/Dryer

1.5.4 Mail-box

2 Conclusion

2.1 Similar Posts:

How do you replace the battery?

Although replacing the battery is easy, it takes patience.

Make sure to have a flat-head, small screwdriver handy before you start . This is what you will need to open the white casing.

After you have removed the casing, it’s as easy as taking out the old CR-2450 and replacing it.

Simply slide the white casing back in until it clicks into place.

This video demonstrates how simple it is to do this:

Type of battery

The SmartThings Multipurpose Sensor uses one, 3 Volt CR-2450 lithium battery.

The CR-2450 has a rated capacity that is typically between 550 and 620 mAh .

The unit that measures electric power over time is called mAh. It is used to determine the battery’s energy capacity. In general, The larger the battery capacity , the longer the battery life .

It is not surprising that CR-2450 battery with a lower mAh cost less than the CR-2450 battery with a higher number.

The CR-2450 keeps its power for approximately 8-10years in storage. I believe it’s a smart idea to buy bulk if you can get a deal on a bunch of them.

Battery life

SmartThings reported a average battery lifespan of 6-12 months with its Multipurpose Sensor.

This is my personal experience.

These sensors were purchased almost one year ago. One sensor died within 9 months, the other one is still working almost a year later.

It is likely that the one who died has a routine and it gets used frequently. Example: “Turn on the bathroom light on low if you open your bathroom door after 11 PM.”

The Multipurpose Sensor I have is being used only on my basement door. It rarely triggers an alarm (if at all) if the door is open past 1 AM.

It makes perfect sense that the bathroom door I used to use died first.

Another thing to note is that Multipurpose Sensor battery life percentage readouts are often flat out wrong.

SmartThings acknowledges this

This is because voltage fluctuates over the life of the battery.

All of this to say, don’t be alarmed if your sensor shows “10% battery remaining”. It is likely that it has at least 50% battery remaining.

I would replace the battery only if it shows “1%” or dies.

Multipurpose Sensor Use-cases and Ideas

The SmartThings Multipurpose Sensor’s versatility is what makes it so great.

It measures open/close, vibration and angle (tilt), as well as temperature. It packs quite a punch.

These “different” sensors allow for many different uses .

These are my top picks:


This is the most popular use-case, and it’s also the one that I use most. This sensor can be placed on your door to allow you to do several things.

You can first monitor whether the door is open or closed. Once you have this information, you can trigger a number of automations.

Example: “If my basement doors open between the hours of 1AM and 5AM, turn on all lights to play music from Alexa.”


There is not much to do here. The smart sensor can be added to any window and offers the same functionality as a door.

This is the idea that if you open a window at a specific time or day, you might get an alert or trigger automations.

This use-case is unique because it allows you to leverage the vibration sensor.

Let’s suppose that instead of opening your windows, an intruder broke the glass.

T Hat vibration would still trigger the sensor and your alerts/automations


If you are like me, you check your mailbox at least once a day. My mailman is very inconsistent in his delivery times.

This can be avoided by attaching one end of the Multipurpose Sensor on the inside of your mail-box, and the other to the inside.

You’ll receive an alert “You’ve got mail!” whenever the mail-box door opens.


SmartThings Multipurpose Sensors use a single CR-2450 AA battery that needs to be changed every 6-12months (mine was dead after 9 months).

Use a small flat-head screwdriver to replace the battery. Then, force the casing open with the screwdriver. It takes only 2 minutes.

SmartThings Multipurpose Sensor can be used in a variety of ways.

How do you use yours? Please leave a comment below.



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