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Liftmaster 485lm OEM Battery Backup
Key item features
- Reliable Operation: This OEM battery backup ensures continuous garage door functionality during power outages, maintaining uninterrupted access.
- Genuine Component: The Liftmaster 485lm is a 100% original equipment manufacturer (OEM) part, specifically Chamberlain part number 4228.
- Fresh Production: Supplied directly from the Liftmaster factory, this battery backup features new production dates for optimal performance and longevity.
- Broad Compatibility: Functions as a replacement for Sears and Home Depot garage door battery backups, extending its utility across various systems.
- Universal Fit: Designed for all battery backup units utilizing a slide-in battery, including models 3850, 8550, and newer versions.
- Simple Installation: Replacement involves disconnecting power, removing the battery cover, swapping the old battery, connecting wires, and reattaching the cover.
- Secure Connection: Installation requires connecting the red (+) and black (-) wires from the motor unit to their corresponding terminals on the new battery.
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Specs
- Volts12 V
- Works withLiftmaster 3850/8550
- Model name485LM
- ManufacturerLiftmaster
- Weight3.75 lbs
- Retail packagingSingle Piece
Current price is USD$67.00
Price when purchased online
- Free shipping
Free 30-day returns
Walmart Protection Plan by Allstate
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Arrives by Wed, Jun 17
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Sold and shipped by Jenkins Trading Post|Pro Seller
4.527950310559007 stars out of 5, based on 161 seller reviews(4.5)161 seller reviews
Free 30-day returns
About this item
Product details
Easy day- battery replacement instructions 1. Disconnect power to opener. 2. Using a Philips 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. Allows you to still come & go through your garage door, when the power goes out Liftmaster 485lm battery backup system - chamberlain part number 4228- 100% omen 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 - 3850/8550 and new models
- Reliable Power: This OEM battery backup ensures continued garage door operation during power outages, allowing uninterrupted access to your garage.
- Genuine Component: The Liftmaster 485lm battery backup system is a 100% original equipment manufacturer (OEM) part, specifically Chamberlain part number 4228.
- Fresh Production: Supplied directly from the Liftmaster factory, this battery backup features new production dates, ensuring optimal performance and longevity.
- Broad Compatibility: It functions as a replacement part for Sears and Home Depot garage door battery backups, extending its utility across various systems.
- Universal Fit: Designed for all battery backup units that utilize a slide-in battery, including models 3850, 8550, and newer versions.
- Simple Installation: The replacement process involves disconnecting power, removing the battery cover with a Philips head screwdriver, swapping the old battery, connecting wires, and reattaching the cover.
- Secure Connection: Installation requires connecting the red (+) and black (-) wires from the motor unit to their corresponding terminals on the new battery for proper function.
info:
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Specifications
Volts
12 V
Works with
Liftmaster 3850/8550
Brand
Chamberlain
Compatibility
LiftMaster, Chamberlain, Sears, The Home Depot
Warranty
Warranty information
No Warranty
Please be aware that the warranty terms on items offered for sale by third party Marketplace sellers may differ from those displayed in this section (if any). To confirm warranty terms on an item offered for sale by a third party Marketplace seller, please use the 'Contact seller' feature on the third party Marketplace seller's information page and request the item's warranty terms prior to purchase.
Please be aware that the warranty terms on items offered for sale by third party Marketplace sellers may differ from those displayed in this section (if any). To confirm warranty terms on an item offered for sale by a third party Marketplace seller, please use the 'Contact seller' feature on the third party Marketplace seller's information page and request the item's warranty terms prior to purchase.
Warnings
Ingestion Hazard
This product contains a battery. Death or serious injury can occur if ingested. A swallowed battery can cause Internal Chemical Burn in as little as 2 hours. Keep new and used batteries OUT OF REACH OF CHILDREN. Seek Immediate medical attention if a battery is suspected to be swallowed or inserted inside any part of the body.
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Customer ratings & reviews
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Showing 1-3 of 8 reviews
Oct 9, 2025
Susan
5 out of 5 stars review
Verified Purchase
Liftmaster Battery Backup
Easy to find and order this backup battery online, thanks to the pictures and description. The instructions, along with a YouTube video, made it easy for me--a 71-year-old woman--to install this battery myself in a couple minutes. Battery arrived timely and in good conditions.
Incentivized Review
Helpful?37XAP5F5230Z450237314
reply from TheChamberlainTeam
Hi, Susan. Thank you for sharing your review with us. We are so glad to see that you are enjoying your experience with us, and our team will be glad to see your positive comments. Should you have any questions about our products in the future, please email social@chamberlain.com. Thank you for choosing Chamberlain.
Feb 28, 2026
Dana
5 out of 5 stars review
Verified Purchase
I bought this through Walmart as there was no shipping charge! So I definitely saved.
Incentivized Review
Helpful?37XAP5F5230Z450237314
May 27, 2021
Denise
5 out of 5 stars review
Verified Purchase
Great deal!
The battery was recently manufactured and had the sticker on outside of box--could see right away. Also had a sticker with that info plus a space where you could write the date it was installed. Fast arrival!! Fair price...lower than other retailers! Last, exact same battery, lasted longer than what I found when researching.
Helpful?37XAP5F5230Z450237314
