If the door works then you re good to go.
Change garage door opener battery.
Insert a screw driver tip in it and slightly twist it it will remove the top of the case.
That garage door remote control is an extremely handy little gadget allowing you to open and close your garage door without ever leaving your car.
Check again and see if your door is opening.
The battery in your remote usually lasts between 2 and 5 years depending on the battery and how often you use your remote.
Other types of remote controls have screwed in locks at the back so you may need to use a screwdriver to get the batteries out.
Remove the old battery and replace it with a new one placing it positive side up.
How to change the battery on a liftmaster door opener remote.
Step 2 replace the batteries.
Repeat the same process for the remote taking out the old batteries and replacing them with new ones.
This remote uses cr2032 battery.
If your garage door opener operates via remote control you can remove the old batteries by simply sliding the door located at the back of the remote control.
Like most electronic gadgets these days your garage door opener remote is operated by a battery.