Guardian Garage Door Opener Battery Replacement - EASY DIY
A23 battery you need - https://amzn.to/3Wm5pTM
Here is a quick and simple little demonstration video on how to change out the battery in your Guardian garage door opener. The process is simple and only requires a screwdriver and a fresh A21/23 battery. Unscrew the two philips screws on the back and then split the two halves apart. Replace the weak battery as I've shown and screw them back together. You're all set!
Guardian R2BCC Garage Door Opener 2 Button Remote Control Clicker Clear-Com 1832