Replacing the batteries was.
How to change battery in garage door opener chamberlain.
Open the light lens of the garage door opener.
This video demonstrates how to change the battery in your chamberlain universal garage door remote model klik3u.
For more information about the chamberlain.
How to change chamberlain garage door opener battery.
My garage door opener stopped working.
To replace you garage door opener battery you will need only safety protection gloves and eye protection the replacement battery and a screw driver.
Unplug the garage door opener from the power.
Remove the battery compartment cover.