Why is my Liftmaster remote not working after replacing the battery?

There could be several reasons why your Liftmaster remote is not working after replacing the battery. It could be due to a faulty battery, improper installation of the new battery, a malfunction in the remote itself, or a problem with the garage door opener. It is recommended to check the battery, reinsert it properly, and if the issue persists, consider contacting Liftmaster customer support for further assistance.