Simplisafe Entry Sensor Battery Low: What You Need To Know

Questions and Answers SimpliSafe 4pack Entry Sensor White ENS304
Questions and Answers SimpliSafe 4pack Entry Sensor White ENS304 from

Keeping your home secure is a top priority for any homeowner. That’s why many people choose to invest in a reliable home security system like SimpliSafe. However, like any electronic device, the sensors in your SimpliSafe system may experience issues from time to time. One common issue that users may encounter is a low battery warning on the entry sensors. In this article, we will explore what this warning means and how to address it.

Understanding the Low Battery Warning

When you receive a low battery warning on your SimpliSafe entry sensor, it means that the battery level is running low and needs to be replaced soon. The entry sensors are responsible for detecting any unauthorized entry into your home, so it’s crucial to ensure they are always in optimal working condition.

Replacing the Battery

Replacing the battery in your SimpliSafe entry sensor is a simple process that you can easily do yourself. Here are the steps to follow:

Step 1: Identify the Sensor

First, identify which entry sensor is displaying the low battery warning. You can do this by checking the SimpliSafe app or the base station display.

Step 2: Remove the Sensor

Once you’ve identified the sensor, remove it from its mounting position. Gently slide the sensor off the mounting bracket or peel it off if it’s adhesive.

Step 3: Open the Sensor

Next, you’ll need to open the sensor to access the battery compartment. Most SimpliSafe entry sensors have a small cover that can be easily opened with a screwdriver or a coin.

Step 4: Replace the Battery

Once the sensor is open, you’ll see the old battery. Remove it carefully and replace it with a new one of the same type. Make sure to follow the correct polarity (positive and negative) indicated inside the sensor.

Step 5: Test the Sensor

After replacing the battery, test the sensor to ensure it is working properly. You can do this by triggering the sensor and checking if it sends the proper signal to the base station. If everything is functioning correctly, you can proceed to remount the sensor.

Preventing Low Battery Issues

While it’s normal for the batteries in your SimpliSafe entry sensors to eventually run out, there are a few steps you can take to prolong their lifespan:

1. Regularly Check Battery Levels

Make it a habit to check the battery levels of your entry sensors at least once a month. This will allow you to identify any sensors with low battery warnings before they completely die out.

2. Keep Spare Batteries

Always have spare batteries available for quick replacements. This way, you won’t have to wait for new batteries to arrive when you need to replace them.

3. Optimize Sensor Placement

Ensure that your entry sensors are placed in optimal positions to minimize false alarms. Sensors placed in high-traffic areas may drain their batteries faster due to increased activity.


Dealing with a low battery warning on your SimpliSafe entry sensor is a simple task that you can easily manage on your own. By following the steps outlined in this article and taking preventive measures, you can ensure that your SimpliSafe system continues to keep your home safe and secure.