Mighty Max Battery MM-H4L Start and Stop Car BCI Group Size 140 Positive Terminal on Left Side [+ -] 12V 50 AH, 80RC, 570 CCA Rechargeable AGM Car Battery
Condition: New
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FREE 30-day refund/replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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Availability:
In Stock.
Arrives
Friday, Sep 25
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Style: Group 140
Features
- Fast Starting Power: This 12V 50Ah 570 CCA delivers strong, steady starts is ready for any weather in any season.
- Made to Last: With its 80-minute Reserve Capacity supports longer run times and a longer overall battery lifespan.
- All Power, No Mess AGM Design: Sealed and spill-proof, the MM-H4L is built with high discharge output and deep discharge recovery to keep power steady when it counts.
- Strength That Starts on the Inside: The rugged construction resists shock, vibration, and harsh conditions, delivering reliable performance across a wide range of temperatures and tough environments.
- Tested Tough & Certified Safe: Mighty Max batteries are built in an ISO-certified facility and meet CE standards for quality, safety, and reliability
- Rechargeable and Versatile: Mounts in multiple positions (excluding upside down) for flexible vehicle installation.
- Dimensions: Sized at 8.00 x 6.75 x 7.44 inches, ready to fit your ride with ease. Polarity is easy to spot, with the positive terminal on the left and the negative on the right.
- Included: Each battery includes mounting screws for quick, hassle-free installation.
- Not Included: Wire harness and mounting accessories are not included.
- 3 Year Warranty: Mighty Max strength, long-haul protection, and confidence that youre powered to the max.
Brand: Mighty Max Battery
Vehicle Service Type: Passenger Car
Size: Standard
Voltage: 12 volts
Battery Cell Composition: Lead Acid
Product Dimensions: 8"D x 6.75"W x 7.44"H
Resistance: 600 ohm
Terminal: Bolt Terminal
Battery Capacity: 50 amp_hours
OEM Part Number: MM-H4
Compatible with Vehicle Type: Passenger Car
Voltage: 12 volts
Resistance: 600 ohm
Terminal: Bolt Terminal
Battery Capacity: 50 amp_hours
Automotive Fit Type: Universal Fit
Size: Standard
Item Dimensions D x W x H: 8"D x 6.75"W x 7.44"H
Battery Type: Lead Acid
Brand Name: Mighty Max Battery
Manufacturer Part Number: MM-H4
OEM Equivalent Part Number: MM-H4
Model Number: MM-H4
Manufacturer: Mighty Max Battery
UPC: 810185371044
Number of Items: 1
Included Components: Battery
Item Type Name: Automotive Start-Stop Battery
Manufacturer Warranty Description: 1 Year Manufacturers Warranty
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Friday, Sep 25
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.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Style: Group 35
If you are looking for a rock-solid, high-performance AGM battery that won't break the bank, the Mighty Max MM-G35 is an absolute home run. The difference in starting power is night and day. Here is why this Group 35 battery easily earns a full 5-star rating: 🚀 Key Highlights & Performance Flawless Start-Stop Performance: This battery handles start-stop cycles effortlessly. AGM (Absorbent Glass Mat) technology is a must-have for modern, high-draw vehicles, and this unit manages the constant on-and-off cycling without breaking a sweat. Massive Cranking Power: With 650 CCA (Cold Cranking Amps), the engine turns over instantly and aggressively, even on freezing cold mornings. There is zero hesitation or sluggishness. Impressive Reserve & Capacity: The 55Ah rating and 100RC (Reserve Capacity) mean you have plenty of reliable power to run accessories, dash cams, and electronics without worrying about draining your main power supply. Built Like a Tank: True to premium AGM design, it is completely sealed, spill-proof, and highly resistant to intense engine vibration. You can install it and completely forget about maintenance, venting issues, or terminal corrosion. 🛠️ Fit and Installation The BCI Group Size 35 form factor is a precise, standard fit. The terminals are cleanly molded, solid, and accept heavy-duty vehicle clamps perfectly. It has a reassuring weight to it, which is a great indicator of the quality and density of the internal lead plates.
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Reviewed in the United States on July 12, 2026 by Reviewer2765
Style: Group 48
Bought this to replace the battery in my Jeep and so far it has been great. It arrived well packaged, fit like it was supposed to, and had plenty of power right out of the box. The Jeep starts strong and I haven't had any issues with it. Considering what some of the name brand AGM batteries cost, this was a much better deal. So far I'm very happy with it and would buy it again.
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Reviewed in the United States on September 2, 2026 by James Williams
Style: Group 48
Absolutely TERRIBLE product. The first one I ordered arrived dead and wouldn't take a charge at all, not even a single volt. I guessed it might have been damaged in shipping. Amazon customer service was great though. They missed an immediate refund and didn't require I return it, and they advised the easiest solution was to simply order again. I did so and the second one arrived and worked fine... For a while. The second one lasted just over a year and was outside of Amazons warranty window so I was told I would need to contact MightyMax directly. They first made me jump through a bunch of hoops including taking it to Autozone to get a scan and a print out of the result (which was "bad" of course, as I had already told them). Every time I emailed them to answer their question or jump through another hoop, it took them 24 to 48 hours to reply, so by the time they agreed it was indeed bad and under warranty, a week had gone by and I needed my car working so I just bought one locally. I told MightyMax I would prefer a refund at this point but they said it was out of the question and advised they would send a replacement (that I don't need at this point). Well, here it is 2 weeks later and still nothing from them. No battery, no email, nothing. Yesterday I sent an email asking for an update and here we are 24 hours later and still nothing. DONT BUY THIS BATTERY! DONT DEAL WITH THIS COMPANY! YOUVE BEEN WARNED.
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Reviewed in the United States on August 4, 2026 by Peter S.
Style: Group 151R
No complaints it's a battery fits in tractor and works
Reviewed in the United States on September 7, 2026 by brendon
Style: Group 35
The cost of this MM-G35 battery was a big factor in my decision to purchase it, as it costs literally half of what some of the big name brands do! I am a great fan of AGM batteries. I’ve used the “yellow top” brand in my heavily modified 2002 Silverado one ton diesel truck since it was just a year old. My first set (Diesel engines require two batteries) lasted an unbelievable 14 years! AGM batteries typically have a much greater service life than lead-acid batteries. I also use an AGM battery in my heavily modified 2005 Jeep TJ. So when my wife’s 2021 Subaru Ascent Touring was ready to a new battery, it was a no-brainer decision that I was going to purchase another AGM battery. The battery was delivered within 36 hours of my purchasing it with zero damage to neither the battery, nor even to the outer packaging. It also arrived fully charged and ready to install. The fit was perfect and installation took less than 10 minutes. I’m very happy to be done with my wife’s old lead acid battery and I hope she has many, many years of trouble free service from her new Mighty-Max battery. 😀 Also, simply by registering your purchase, via the included QR code, the manufacturer’s warranty will be extended an additional three months, 👍 I will also be adding a photo of the installed battery to this review very soon, as the warranty period will be increased by an additional three months by the manufacturer, just for doing so. 👍 I’m very happy with this purchase and I highly recommend this AGM battery!!! 😀
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Reviewed in the United States on February 15, 2026 by Kevin C.
Style: Group 35
Battery is junk had dead cell in two months
Reviewed in the United States on August 21, 2026 by Willy Simkins
Style: Group 35
It was affordable and exact fit for my Vehicle
Reviewed in the United States on September 11, 2026 by Nikki
Style: Group 47
The battey failed in less than THREE months so beware of this battery and the customer service you will receive... I was told by Amazon that it has a ONE year manufactures warranty and to contact the company who sold it through Amazon... I contacted the company with the phone number provided by Amazon and was told from this company that I need to jump thru so many hurdles to prove that the battery was indeed defective... They even are nice enough to send you a link to explain all the hurdles you need to go thru... It's not enough that the dead battery left us stranded and not even a concern that this had happened to us from the seller. Finally after giving in to the seller and not wanting to jump thru all the hurdles that they place in front of you because it would just take to much time and effort... I believe they want so many things from you so that you do just give up on trying to get a return at no cost for their defective battery... So do yourself a favor and just go to an auto store and pay a little bit more because if the battery goes bad this soon they replace it with no problem at these stores... Also to prove this battery is bad they want you to use one of these auto part stores to use their tester to show that the battery is no good anyway and they also want the auto sotre to provide you with documentation LOL... You may also be told as I was that you are responsible for shipping cost to return the defective battery to them. So you don't save anything if a problem arises with this battery... I hope this helps with your decision to purchase this battery because it should have ZERO stars...
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Reviewed in the United States on December 10, 2025 by MFRYE