Chamberlain 485LM battery backup front view showing OEM compatibility and outage resilience.
Chamberlain 485LM installation angle highlighting easy DIY replacement and garage access.

CHAMBERLAIN

Chamberlain LiftMaster 485LM Battery Backup – OEM Replacement (4228)

High-performance tools and home improvement made for confident daily results

$94.78

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Why customers choose TaskHolt Tools

Keep garage access during power outages

When the power dips, your routine doesn’t have to stall. The Chamberlain LiftMaster 485LM Battery Backup is an OEM replacement designed to help your garage door operate even when the lights go out. Standing up to daily use, this genuine part (LiftMaster 4228) aligns with factory specifications to support reliable performance when mains power is interrupted.

What makes this backup notable

More than a spare part, this backup is a practical safeguard for everyday life. Key benefits include:

  • Maintain entry and exit during outages, so your schedule stays on track.
  • OEM engineering by LiftMaster, ensuring compatibility and dependable operation with the 485LM line.
  • Fresh production dates from the LiftMaster factory, aligning with current design standards.
  • Cross-brand compatibility with Sears and Home Depot backup units that use a slide-in battery.
  • Broad compatibility with other slide-in battery backups, including 385/855 and newer models.

Compatibility highlights

Designed to fit a range of backup configurations, this OEM part (4228) supports continued operation across multiple models, making it a logical option for owners seeking a legitimate replacement that matches factory specs.

  • OEM part number: 4228, ensuring proper fit and electrical connections.
  • Works with LiftMaster 485LM systems and other brands’ compatible backups that use slide-in batteries.
  • New production dates indicate up-to-date manufacturing standards.
  • Supports backup operation across multiple models, including 385/855 and newer designs.

Easy DIY replacement

Replacing the 485LM battery is a straightforward DIY task. The steps mirror common garage-door maintenance routines, helping you stay in control when outages occur or during routine maintenance.

  • Power down the opener to ensure safety.
  • Using a Phillips screwdriver, remove the battery cover on the motor unit.
  • Take out the old battery and dispose of it properly.
  • Partially insert the new battery into the motor unit, terminals facing outward.
  • Connect the red (+) and black (-) wires from the motor unit to the corresponding battery terminals.
  • Replace the battery cover securely.
  • Reconnect power to resume normal operation.

FAQ

Q: What devices work with the 485LM Battery Backup?

A: It's an OEM backup designed for LiftMaster 485LM units and compatible slide-in battery models.

Q: How do I replace the 485LM battery?

A: Power off the opener, remove the battery cover, replace with a new battery (terminals facing out), reconnect power.

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