LiftMaster / Accessory reference

LiftMaster 485LM

LiftMaster 485LM: Battery-backup component described for LiftMaster 3850, 8360 and 8550 openers.

US source scopeUpdated 2026-09-12Independent Anderson reference

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Manufacturer identifier: 485LM. Keep every character when comparing it with your label or paperwork. A similar number does not establish the same component.

Denco supplier reference: LO 485LMh1; span.sku; Description first bullet: exact three opener models · checked 2026-09-12 · Denco

Values apply to the exact identifier and scope in the cited source.
Supplier-stated detail	Battery-backup component described for LiftMaster 3850, 8360 and 8550 openers. Denco supplier reference: LO 485LMh1; span.sku; Description first bullet: exact three opener models · checked 2026-09-12 · Denco
Selection limitation	The list does not establish W, P or other suffix variants. Battery voltage, capacity, chemistry and connector details are unspecified; ratings from 41B591 do not apply by inference. Denco supplier reference: LO 485LMh1; span.sku; Description first bullet: exact three opener models · checked 2026-09-12 · Denco

Documented fitment & exclusions

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Source statements and their exact conditions. Use the checker below to compare equipment or a component.
Equipment or component / relationship	Evidence and conditions
3850 Documented compatibility From 485LM to 3850.	Conditional Additional source conditions or an adapter must be checked before confirming compatibility. Details still needed connection-purpose source conditions Use the exact label and the source scope below. An unanswered condition keeps this result conditional or unverified. Denco names 485LM in the stated application with 3850. Only 3850, 8360 and 8550 are named. Wiring, installed configuration and other model suffixes remain unverified. Applies only within this source scope Market: US Model scope: 3850 connection-purpose: 485LM battery-backup use with the exact named opener. Denco supplier statement for the US reference catalog; confirm the installed equipment and required functions. This is not a physical fitment test. Only 3850, 8360 and 8550 are named. Wiring, installed configuration and other model suffixes remain unverified. Denco supplier reference: LO 485LMh1; span.sku; Description first bullet: exact three opener models · checked 2026-09-12 · Denco
8360 Documented compatibility From 485LM to 8360.	Conditional Additional source conditions or an adapter must be checked before confirming compatibility. Details still needed connection-purpose source conditions Use the exact label and the source scope below. An unanswered condition keeps this result conditional or unverified. Denco names 485LM in the stated application with 8360. Only 3850, 8360 and 8550 are named. Wiring, installed configuration and other model suffixes remain unverified. Applies only within this source scope Market: US Model scope: 8360 connection-purpose: 485LM battery-backup use with the exact named opener. Denco supplier statement for the US reference catalog; confirm the installed equipment and required functions. This is not a physical fitment test. Only 3850, 8360 and 8550 are named. Wiring, installed configuration and other model suffixes remain unverified. Denco supplier reference: LO 485LMh1; span.sku; Description first bullet: exact three opener models · checked 2026-09-12 · Denco
8550 Documented compatibility From 485LM to 8550.	Conditional Additional source conditions or an adapter must be checked before confirming compatibility. Details still needed connection-purpose source conditions Use the exact label and the source scope below. An unanswered condition keeps this result conditional or unverified. Denco names 485LM in the stated application with 8550. Only 3850, 8360 and 8550 are named. Wiring, installed configuration and other model suffixes remain unverified. Applies only within this source scope Market: US Model scope: 8550 connection-purpose: 485LM battery-backup use with the exact named opener. Denco supplier statement for the US reference catalog; confirm the installed equipment and required functions. This is not a physical fitment test. Only 3850, 8360 and 8550 are named. Wiring, installed configuration and other model suffixes remain unverified. Denco supplier reference: LO 485LMh1; span.sku; Description first bullet: exact three opener models · checked 2026-09-12 · Denco

Direct replacement paths

No direct successor for 485LM is verified in this reference.

A direct replacement statement does not establish reverse interchangeability, a kit equivalent or a later replacement chain.

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Sources & scope

Denco supplier reference: LO 485LMDenco · US · checked 2026-09-12

Anderson prepared this reference from the listed evidence. Source statements are not an Anderson installation inspection or independent product test. Official documents stay on their publisher’s website.

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