Overview
This article explains how to safely replace the battery in a Codebox lockbox so it continues generating access codes without interruption.
When to replace the battery
Replace the battery when:
The Codebox displays low-battery warnings
Access codes fail due to low power
You notice erratic screen behavior
Using fresh batteries prevents showing interruptions.
What you’ll need
(1) 9-volt alkaline battery
Small flathead screwdriver
Clean, dry work surface
Optional: gloves
Step-by-step battery replacement
If the display still works when you press any key:
Enter the door code and open the key bin
Using a flathead screwdriver, remove the battery cover
Replace the 9V battery behind the battery cover
Fasten the screw back in place, securing the battery cover
If the lockbox has no power:
Look on the bottom of the lockbox to find the battery port
Touch the 9V battery to the battery port. Hold it in place until the lockbox has enough power for the screen to turn on
Enter your door code to open the key compartment door
Using a flathead screwdriver, remove the battery cover
Replace the 9V battery behind the cover
Fasten the screw back in place, securing the battery cover
Tips for reliable battery performance
Use fresh alkaline 9-volt batteries only (do not use rechargeable 9-volt batteries).
Store spare batteries at room temperature.
Avoid mixing old and new batteries.
When to contact support
If the lockbox still won’t power on after battery replacement:
Confirm the battery is installed correctly
Try a new, unused 9-volt alkaline battery
Check for corrosion or debris in the battery compartment
If issues persist, contact Codebox Support at (888) 507-8885 with:
The lockbox serial number
A description of what happened
What you tried
Support can help identify whether the device has other hardware issues.
Safety reminder
Handle batteries carefully:
Avoid contact with metal objects
Do not attempt to recharge non-rechargeable batteries
Keep batteries away from children and pets