What Happens If Smart Lock Battery Dies: Everything You Should Know

Have you ever wondered what would happen if your smart lock battery suddenly dies? Smart locks have revolutionized home security, providing convenient keyless entry options. However, when the battery of a smart lock reaches its limit, it can leave you feeling locked out of your own home. In this article, we will explore the implications of a dead smart lock battery and guide you on how to open electronic door lock without key. We will also cover essential information on how to change the battery in your smart locks, ensuring that you're well-prepared for any battery-related challenges that may arise.



What Happens if Smart Lock Battery Dies?

When your smart lock battery dies, these consequences may occur.

  • Firstly, you will lose the ability to access your home through keyless methods such as fingerprint scanning, keypad entry, or smartphone connectivity. This can be inconvenient and frustrating, especially if you rely solely on your smart lock for entry.
  • Secondly, any remote access features, such as granting temporary access to guests or monitoring your lock remotely, will be disabled until the battery is replaced.

It is crucial to understand these implications and be prepared with alternative methods of entry.

How to Know When the Smart Lock Battery Is Low?

Recognizing the signs of a low smart lock battery is crucial for ensuring uninterrupted access to your home. Before you ask “Why is my keyless entry pad not working”, here are some key points to help you identify when the battery is running low ahead of time:

Visual Indicators

Many smart locks have LED lights or indicators that flash or change color to indicate a low battery. These lights are usually located on the front or side of the lock. Pay attention to any changes in the light pattern, such as a slower or more frequent blinking, as this could be a sign of a low battery.

Audible Alerts

Some smart locks are equipped with built-in speakers that emit beeping sounds when the battery is running low. These alerts are designed to draw your attention and prompt you to replace the battery. If you hear consistent beeping or irregular sounds coming from your smart lock for the house, it's a clear indication that the battery needs to be replaced soon.

Mobile App Notifications

If your smart lock is connected to a mobile app, it may send notifications to your smartphone when the battery is low. These notifications can be in the form of pop-up messages, push notifications, or emails. Make sure to enable notifications for your smart lock app and keep an eye out for any alerts indicating a low battery.

Reduced Functionality

As the battery power decreases, you may notice a decrease in the responsiveness and functionality of your smart lock. For example, it may take longer for the lock to recognize and respond to your input or there may be intermittent failures in authentication methods such as fingerprint scanning or keypad entry. These performance issues can be a sign that the battery is running low.

Backup Unlock Methods

Some smart locks provide backup unlock methods, such as a physical key or an emergency power supply. If you find yourself needing to use these backup methods more frequently than usual, it could indicate a low battery. Take this as a reminder to replace the battery soon to avoid being locked out completely.

How to Open Electronic Door Lock Without Key?

If you find yourself locked out due to a dead smart lock battery, don't panic. There are a few methods you can employ to regain access to your home without a key. Similar to how to unlock a keypad door lock without the code, here are some options:

Backup Power Source

Some smart locks come with a backup power option, such as a 9-volt battery terminal. By connecting a fresh 9-volt battery to this terminal, you can temporarily power the lock and regain entry using your usual authentication method.

Physical Key Override

Many smart locks are equipped with a traditional keyhole as a backup option, like eufy S330 Smart Lock. Insert the provided physical key into the keyhole and turn it to unlock the door manually. It's crucial to keep your physical key in a secure and easily accessible location. 

Mobile App or Bluetooth Backup

If your smart lock is connected to a mobile app or uses Bluetooth, you may still be able to unlock the lock even if the battery is dead. Ensure that your smartphone has enough battery power to establish a connection and use the associated app to unlock the door.

Good News! With Eufy WIFI Smart Lock C210, you can unlock your door intelligently by using the keypad or physical key, from Apple Watch, or by using your voice with Alexa/Google Voice Assistant. It has been gaining more and more popularity as a long-lasting keyless entry door lock.

eufy smart door lock 

How to Change Battery in Keyless Door Lock?

Keyless entry door lock battery replacement is essential for uninterrupted operation. It is the most direct way for keyless entry door lock troubleshooting. Follow these general steps to change the battery:

Identify the battery type

Check the manufacturer's instructions or consult the user manual to determine the type of battery required for your smart lock.

Locate the battery compartment

Most smart locks have a battery compartment, usually located on the interior side of the door. Open the cover or slide off a panel to access the compartment.

Replace the battery

Remove the old battery and replace it with a new one of the same type. Ensure that you insert the battery correctly, following the indicated polarity markings. It is similar to how to change battery on keypad door lock.

Test the lock

After replacing the battery, test the lock to ensure it functions properly before closing the battery compartment.

smart lock 


In conclusion, understanding what happens when your smart lock battery dies is crucial for maintaining a secure and convenient home environment. By recognizing the signs of a low battery, you can take proactive measures to avoid being locked out. In the event of a dead battery, alternative methods such as backup power sources, physical key overrides, or mobile app connections can help you regain access. Remember to change the battery regularly to prevent any unexpected lockouts. With these insights and solutions, you can confidently navigate the challenges associated with smart lock batteries and ensure seamless access to your home. 


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