LiftMaster New 485LM Battery Backup for Garage Door Openers 3840 3850 8360 8550

Liftmaster 485LM is a 12V Replacement Battery. For use with various DC Motor Garage Door Openers featuring Backup Battery Systems. Check the manual or replacement parts diagram for specific part information before ordering to ensure compatibility., Operates the Garage Door Opener as if the power was still on, plus all safety and security features will be operational, 12V replacement battery is used in the following models: 8500, 8500W, 8550W, WLED, 8360, & 8360W, Max door weight with battery increases from 650 lbs. to 850 lbs. with the addition of the 485LM Battery on LiftMaster Models LJ8900W and LJ8950W. Genuine replacement part.