There are just four simple steps to take to replace your LiftMaster keypad battery: Slide the battery cover down. The battery is located at the bottom of your keypad. Disconnect the old battery and remove it. Remember to dispose of your old battery correctly. Install the new battery. Put the battery cover back in place. Click to see full answer. Likewise, what kind of battery goes in a LiftMaster garage door opener?Insert two replacement batteries positive side up (+). Replace the batteries with only a 3V CR2032 coin cell battery.Likewise, how do I reset my LiftMaster garage door opener? How to Reset a LiftMaster Garage Door Press and release the “learn” button on the opener’s motor unit. During those 30 seconds, press down and hold the “learn” button on the handheld remote control you want to use to operate the garage door. When the motor unit’s light begins blinking, release the remote button. Also question is, do you have to reprogram garage door remote after changing battery? After Battery Replacement As a result, homeowners may need to reprogram the garage door opener whenever the batteries are changed. Although this is not necessary for all garage door openers, many of the models used in today’s world require reprogramming after battery replacement.Why is my LiftMaster garage door opener beeping?If you’re using a Liftmaster timer-to-close or other similar technology, the garage door opener will beep to indicate when the door is closing. Your garage door might be operating on battery power. Whenever that happens, the opener will beep to let you know it’s running on the backup battery.