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LiftMaster/Chamberlain Replacement Part - 485LM Integrated Battery Back Up System For Garage Door Openers 3850, 8360, and 8550 Models

SKU 712-LMP-485LM
Original price $110.39 - Original price $110.39
Original price $110.39
$110.39
$110.39 - $110.39
Current price $110.39

GarageDoorProject is proud to use only US vendors with 100% OEM parts and all new production dates. Liftmaster Direct 485LM Replacement Part Number. Included in all orders is our GarageDoorProject Multi-Screwdriver Keychain.

Compatibility - Other Part Numbers: 041A6357-1, 41A6357-1, 012381742288, 485LMC, 012381994854- ( Sears, Home Depot, Amarr, Clopay, Raynor)

Easy DIY Liftmaster Battery Replacement - A garage door opener battery will typically need to be replaced every one to two years, and replacing it is as simple as seven easy steps. All you'll need is some gloves, safety eye wear and a screwdriver.


Power Supply - 12V 485lm liftmaster replacement battery is used in the following models: 8500, 8500W, 8550W, WLED, 8360, & 8360W- Fully charged the battery will allow for 2 days or 20 open and close cycles with no power.

100% OEM Liftmaster garage door opener battery replacement product is compatible with part numbers 041A6357-1, 41A6357-1, 012381742288, and 485LMC.

Product Description

LiftMaster 485LM Integrated Battery Backup Professional-Grade Battery Backup System For Garage Door Openers 3850, 8360, 8550 | GarageDoorProject | 100% OEM | US Vendor

The LiftMaster 485LM Integrated Battery Backup delivers reliable power backup for your garage door opener, ensuring seamless operation during power outages. This integrated battery backup supports LiftMaster models 3850, 8360, and 8550, enabling your garage door to open or close up to 20 times without main power. Designed for emergency garage door power, it offers peace of mind and continuous access when you need it most.


This professional-grade garage door battery replacement features a compact battery design weighing only 3.52 lbs and measuring 3.54" x 2.76" x 3.98" for easy handling and installation. The 12 volt garage battery provides 4.5Ah capacity with an F1 terminal type for consistent, long lasting backup power. Tested and backed by a 1 Year Limited Warranty, this battery backup system guarantees dependable performance and durability.


Key features include:

- Compatible with LiftMaster models 3850, 8360, and 8550 for seamless integration
- Power outage garage backup supports up to 20 full open/close cycles
- Easy install garage battery designed for quick replacement without tools
- Compact battery design that fits neatly inside your opener system
- Provides emergency garage door power during unexpected outages

Technical specifications:

- Model: 485LM
- Nominal Voltage: 12V
- Nominal Capacity: 4.5Ah
- Terminal Type: F1
- Weight: 3.52 lbs (1.6 kg)
- Dimensions: 3.54" (90 mm) L x 2.76" (70 mm) W x 3.98" (101 mm) H
- Warranty: 1 Year Limited Warranty

Upgrade your garage's reliability with this LiftMaster battery replacement that maintains smooth operation even during power failures. The integrated battery backup system from GarageDoorProject® is a trusted OEM product with new production dates, ensuring quality and compatibility with your LiftMaster opener. Keep your garage secure and accessible at all times with this essential backup battery.


Whether you face frequent outages or want extra security, the LiftMaster 485LM offers a professional solution that installs easily and lasts long, providing uninterrupted power when you need it most.

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