---
product_id: 18038313
title: "Liftmaster 485LM Battery LiftMaster Garage Door Openers 485LM Battery Backup, OEM"
brand: "chamberlain"
price: "1274 kr"
currency: DKK
in_stock: true
reviews_count: 13
category: "Chamberlain"
url: https://www.desertcart.dk/products/18038313-liftmaster-485lm-battery-liftmaster-garage-door-openers-485lm-battery-backup
store_origin: DK
region: Denmark
---

# 4.5 Amps reliable amperage 12V battery backup power DIY-friendly easy installation Liftmaster 485LM Battery LiftMaster Garage Door Openers 485LM Battery Backup, OEM

**Brand:** chamberlain
**Price:** 1274 kr
**Availability:** ✅ In Stock

## Summary

> 🔋 Power through outages like a pro — never get stuck outside again!

## Quick Answers

- **What is this?** Liftmaster 485LM Battery LiftMaster Garage Door Openers 485LM Battery Backup, OEM by chamberlain
- **How much does it cost?** 1274 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/18038313-liftmaster-485lm-battery-liftmaster-garage-door-openers-485lm-battery-backup)

## Best For

- chamberlain enthusiasts

## Why This Product

- Trusted chamberlain brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Uninterrupted Access:** Keep your garage door operational even during power outages with seamless battery backup.
- • **OEM Certified Quality:** 100% genuine LiftMaster part ensures perfect compatibility and durability.
- • **Universal Compatibility:** Works flawlessly with LiftMaster, Sears, and Home Depot battery backup units.
- • **Long-Lasting Performance:** Designed to match or exceed original battery life for years of dependable use.
- • **Effortless DIY Replacement:** Simple step-by-step installation saves time and avoids costly service calls.

## Overview

The Chamberlain LiftMaster 485LM Battery Backup is a 12V, 4.5 Amp OEM replacement battery designed to keep your garage door opener functional during power failures. Compatible with multiple LiftMaster models and major retailer units, it offers easy DIY installation and reliable, long-lasting performance to ensure uninterrupted access to your home.

## Description

Easy DIY- Battery Replacement Instructions 1. Disconnect power to opener. 2. Using a Phillips head screwdriver, remove the battery cover on the motor unit. 3. Remove old battery and discard. 4. Partially insert new battery into motor unit with terminals facing out. 5. Connect red (+) and black (-) wires from motor unit to corresponding terminals on battery. 6. Replace battery cover. 7. Reconnect power.

Review: Good for 84602 model - It works great with my Liftmaster opener (model 84602). The original battery lasted three years, so I'm hoping this one will last longer.
Review: Easy installation - The main thing is that it was the right size and was fairly easy to install…thank you

## Features

- 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

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B001T3WHZ8 |
| Amperage | 4.5 Amps |
| Batteries | 1 12V batteries required. |
| Best Sellers Rank | #93,775 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #75 in Garage Door Opener System Parts |
| Brand | CHAMBERLAIN |
| Customer Reviews | 4.6 4.6 out of 5 stars (1,525) |
| Date First Available | February 13, 2009 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 3.13 pounds |
| Item model number | 485lm |
| Manufacturer | Liftmaster |
| Manufacturer Part Number | 485lm |
| Model | 475lm |
| Product Dimensions | 4 x 4 x 4 inches |
| Special Features | Allows you to still come and go through your home’s primary access point, your garage door, when the power goes out., The Liftmaster 485LM EverChargeTM Battery Backup System can be used with the Liftmaster Model 3850(available separately, |
| Voltage | 12 Volts (DC) |

## Product Details

- **Battery Capacity:** 12 Amp Hours
- **Battery Cell Composition:** Sealed Lead Acid
- **Brand:** CHAMBERLAIN
- **Number of Batteries:** 1 12V batteries required.
- **Recommended Uses For Product:** Garage Door Opener

## Images

![Liftmaster 485LM Battery LiftMaster Garage Door Openers 485LM Battery Backup, OEM - Image 1](https://m.media-amazon.com/images/I/711e-okZBFL.jpg)

## Questions & Answers

**Q: Is this a genuine oem by liftmaster/chamberlain?  i am seeing both yes and no here.**
A: LiftMaster is made by Chamberlain Group. They are the same product with a different sticker. Quality will be exactly the same.

**Q: Can this be used on the Liftmaster Model 8360LM?**
A: The battery is 2 and 3/4 inches by 3 and 1/2 inches by 4.0 inches with the terminals on the long end.  If your battery compartment is large enough for this size battery, it will definitely work for you.s

**Q: Is this battery an agm battery?  if not, are agm batteries better?**
A: I replaced my battery when it was beeping.

**Q: is this battery compatable with lift master 8500?**
A: No the 485lm is only for trolley operators with battery back up. The 8500 has the external battery 475LM. You can either buy the whole unit 475lm or the 2 internal  batteries-  041B0591 Liftmaster 475 Replacement Batteries

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good for 84602 model
*by E***T on November 17, 2025*

It works great with my Liftmaster opener (model 84602). The original battery lasted three years, so I'm hoping this one will last longer.

### ⭐⭐⭐⭐⭐ Easy installation
*by D***N on July 29, 2025*

The main thing is that it was the right size and was fairly easy to install…thank you

### ⭐⭐⭐⭐⭐ Works perfectly well.
*by D***E on July 2, 2012*

This is battery was a perfect replacement for the original Liftmaster battery which was inoperable after about 5 years, the expected time of its demise. It looked new, even if its manufacture date was about a year old which is no problem for a lead battery that has not seen any service, and it was in a Liftmaster box, with labelling on the battery which looked exactly like the original. Both are made in China, and it seems either original or made by the same company that sells directly to Lifemaster. Of course, since I just installed it, I can't comment on duration of life, but its surface voltage was correct, and it operates the door without problem with the AC disconnected from the motor. The battery was shipped promptly and came in good time, properly packaged. Based on service rates where I live, between the call and the extra markup on the battery if you buy it through dealers or servicemen, you'll probably save $150-$200 to do it yourself which is an absolute snap. I think any one of my five cats could have done it: Just remove one Phillips screw, pull the battery half out, disconnect the terminals, insert new battery halfway in the housing, reconnect the terminals, which are size coded to you can't get it wrongly, and push the battery home, close the door and reinsert the single screw. It takes all of a few minutes tops. Because this is a low voltage circuit, you don't need to turn off the power, and you are in no proximity to high voltage wiring. After you have successfully installed the battery, the low voltage beeping should go away, and you should have no more orange or red warning lights on the chassis. After you have had the battery in service for 24 hours, disconnect the motor by pulling out the AC power cord, simulating a power failure, and run the door up and down a couple of times to be sure that the battery is working properly with a load BEFORE you throw the shipping box away. BOTTOM LINE: ENTHUSIASTICALLY RECOMMENDED WITHOUT RESERVATION.

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*Product available on Desertcart Denmark*
*Store origin: DK*
*Last updated: 2026-01-22*