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Extreme Max

Extreme Max 1229.4023 Battery Buddy 4-Bank Battery Charger/Maintainer

  • Based on 703 reviews
Condition: New
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Availability: In Stock.
Fulfilled by OmniHop
Arrives Sep 11 – Sep 13
Order within 11 hours and 32 minutes
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Style: 4-Bank Charger


Features

  • Allows simultaneous charge of up to four 12-volt lead-acid batteries - Each cord set measures 4' 10" in length for maximum efficiency and range
  • 12V, 2A per charging bank
  • LED light indicators show battery status
  • Protection against wrong connections and short-circuiting
  • No risk of overheating charger or batteries

Description

The Battery Buddy 4-Bank Battery Charger/Maintainer is a multi-step battery charger giving you the ability to charge up to four 12-volt batteries simultaneously and maintain them at their proper storage voltage. Voltage flow during the charge is regulated and allows the batteries to be fully and safely recharged without overcharging them. Note: The Battery Buddy 4-Bank battery Charger is not waterproof. Includes a one-year limited warranty.

Brand: Extreme Max


Color: 4-Bank Charger


Product Dimensions: 14.37"D x 11.42"W x 3.74"H


Item Weight: 3.8 pounds


Output Voltage: 12 volts


Output Voltage: 12 volts


Input Voltage: 12 volts


Current Rating: 2 A


Amperage: 2 A


Compatible Devices: 12-volt lead-acid batteries


Connector Type Used on Cable: clamp


Number of Ports: 4


Item Dimensions D x W x H: 14.37"D x 11.42"W x 3.74"H


Item Weight: 3.8 pounds


Specification Met: UL


Color: 4-Bank Charger


Brand: Extreme Max


Mfr Part Number: 1229.4


Global Trade Identification Number: 21


UPC: 814166025421


Number of Items: 1


Manufacturer: Extreme Max


Built-In Media: Extreme Max 1229.4023 Battery Buddy 4-Bank Battery Charger/Maintainer


Item Type Name: Extreme Max 1229.4023 Battery Buddy 4-Bank Battery Charger/Maintainer


Model Number: 1229.4


Warranty Description: 1-year limited warranty


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sep 11 – Sep 13

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
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  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Does The Job.
Style: 4-Bank Charger
Been using this charger/maintainer over two winters. It has kept two car batteries and two motorcycle batteries alive and well come spring. Recommended.
Reviewed in the United States on May 22, 2026 by cadman_57
    • Perfect for my 24-volt battery system
Style: 2-Bank Charger
This charger is working great for my two 12-volt batteries wired up in a series to give me 24-volts. I can connect it to the batteries using the connectors it comes with and that makes charging the boat so fast and easy. Definitely a good purchase.
Reviewed in the United States on September 6, 2024 by James K.
    • keeps 8 batteries charged using splitters with no issues !
Style: 4-Bank Charger
has been working flawless and have splitters charging 8 batteries on my bikes and auto collection with no issues ... defintely recommend it ..
Reviewed in the United States on June 17, 2026 by Oscar Marrufo
    • Excellent product;.
Style: 4-Bank Charger
I'm going to say a big yes. I have a BMW Motorcycle and a Kymco scooter. I also have a big John Deere zero turn lawnmower, and all have 12V batteries. I am not looking forward to replacing any batteries next spring. And we do have some cold spells through the winter here. The cost of this unit is better than trying to buy one unit for each. I do have one gripe. The wiring is only four feet or less going to each battery, so be prepared to buy extension battery cables for each of the four lines. You cannot park every device three feet from this unit. Still, a good value for what you get, and the extension cables aren't that expensive. So for me, this is a best buy. ... show more
Reviewed in the United States on November 1, 2024 by Elmo
    • Happy with it!
Style: 4-Bank Charger
I have use this system for 2 years now, works like in tended.
Reviewed in the United States on February 28, 2026 by Paul wicker
    • Great for storing and charging batteries
Style: 4-Bank Charger
This is a high quality charger. it comes with attachments for four batteries and i have been using it for over a year. I would highly recommend.
Reviewed in the United States on December 14, 2025 by Gus
    • Connector corroded and shorted battery and unit failed after 2 years of use.
Style: 4-Bank Charger
Purchased 8/24/2023 and at first it worked well. Then, I started to have trouble with the lights not showing it was charging but after disconnecting the unit and plugging back in, the lights started working again. In January of this year all 4 of my batteries started having issues and one was completely dead, I never gave the charger a thought and purchased 4 new batteries. Last week my new port start battery was dead as a doornail and my house bank didn't seem to be fully charged. so I pulled it and charged it on a different charger at home and tested it and it was perfect. Discovered that the quick connector for port battery was shorted inside and another one of the banks had zero voltage output which explains why my house bank kept getting low. Ended up removing the charger and threw it away. Would not purchase again as the wires are not marine rated and the unit only worked intermittently. ... show more
Reviewed in the United States on July 13, 2026 by Bob Rice
    • Battery charger
Style: 2-Bank Charger
Charges battery well. Mounting holes give plenty of options to mount. Cords are long enough to mount in the back of a boat. Only 2amp but works. Just takes a little longer. LED lights for power and charged light could be a little brighter, hard to see in direct sunlight. Package was missing eyelet adaptors when delivered. Seller was quick to respond to situation and shipped me two very quickly. Excellent service. ... show more
Reviewed in the United States on November 19, 2024 by Tucker Wagers

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