How to Change the Battery and Update a SentriGuard Lockbox

Press ‘ENT’ on the lockbox.
If nothing occurs, take a pen or a small object and locate the center button on the lockbox. You can find it beneath the SentriLock logo and just above the keypad. This button is situated in the middle of a set of three buttons.
The LEDs next to it will flicker and this indicates the backup battery is engaged.

Use your SentriKey app to connect to the lockbox and release (and remove) the shackle.

Once the shackle is removed, you can remove the rubber plug on the top of the lockbox.
Using a T-15 TORX screwdriver, remove the screw.
Once done, remove the top cap of the lockbox. This will expose the battery.
Next, unplug the old battery and replace it with the new one.

Put the top cap of the lockbox back on. Make sure the gap between the top cap and the lockbox is as small as possible using a firm push.
Put the screw in and secure it with the T-15 TORX screwdriver by rotating it towards the right.
Insert and push in the rubber cap.
Put the shackle back into place.

This menu is often called the “Hamburger Menu” and is 3 horizontal bars stacked on top of one another in the top left corner.

This will take you to another screen.

It is normal if the lockbox lights begin to flash.

You should see a screen that says ‘Success!’ which indicates the firmware has been successfully updated.

The SentriGuard® lockbox has other amazing features. If you want to look at those, visit our SentriGuard® page.

Take a look at and download our SentriKey Real Estate App.

Check out our SentriLock support page if you need any additional help or want to speak to a customer service representative.