Chamberlain Liftmaster 485LM Battery LiftMaster Garage Door Openers 485LM Battery Backup, OEM
- Allows you to still come & go through your garage door, when the power goes out.
- Lift master 485lm battery backup system – chamberlain part number 4228- 100% OEM.
- New production dates- LiftMaster factory supplied.
- Also works with sears and home depot garage door battery back ups- replacement part.
- Compatibility for all battery back up units with slide in battery – 385/855 and new models.