485LM LiftMaster 12v Battery Backup

Replaces the Old Discontinued Part 4228.

The 485LM works on all Chamberlain integrated battery backup garage door openers.

For use with various Craftsman Garage Door Openers featuring Backup Battery Systems. Operates the Garage Door Opener as if the power was still on, plus all safety and security features will be operational.

Ships the Next Business Day.

⚠WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer or birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov