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Mighty Max Battery MM-G35 Start and Stop Car BCI Group Size 35 12V 55Ah, 100RC, 650 CCA Rechargeable AGM Car battery

  • Based on 1,480 reviews
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Availability: In Stock.
Fulfilled by Amazon

Arrives Friday, Aug 28
Order within 8 hours and 12 minutes
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Style: Group 35


Features

  • Fast Starting Power: This 12V 55Ah 650 CCA delivers strong, steady starts is ready for any weather in any season.
  • Made to Last: With its 100-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-G35 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 9.06 x 6.89 x 8.82 inches, ready to fit your ride with ease. Polarity is easy to spot, with the positive terminal on the right and the negative on the left.
  • 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: Group 35


Voltage: 12 volts


Battery Cell Composition: Lead Acid


Product Dimensions: 9.06"D x 6.89"W x 8.82"H


Battery Capacity: 55 amp_hours


Unit Count: 1 Count


Automotive Fit Type: Vehicle Specific Fit


Manufacturer: Mighty Max Battery


Compatible with Vehicle Type: Passenger Car


Voltage: 12 volts


Battery Capacity: 55 amp_hours


Automotive Fit Type: Vehicle Specific Fit


Size: Group 35


Item Dimensions D x W x H: 9.06"D x 6.89"W x 8.82"H


Battery Type: Lead Acid


Brand Name: Mighty Max Battery


Manufacturer Part Number: MM-G35


Unit Count: 1 Count


Model Number: MM-G35


Manufacturer: Mighty Max Battery


UPC: 850054073877


Number of Items: 1


Included Components: Battery


Item Type Name: 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, Aug 28

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.

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Top Amazon Reviews


  • Absolute Beast of an AGM Battery! Cranks Instantly Every Time!
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. ... show more
Reviewed in the United States on July 12, 2026 by Reviewer2765

  • Strong Specs for People Running a Higher-Demand Electrical Setup
Style: Group 31
A Group 31 AGM battery is appealing because it gives you more capacity and strong starting performance, which matters a lot if the vehicle has added accessories, audio, lighting, or other electrical demand. On paper, this looks like a strong value if you want solid battery specs without jumping straight to very high-priced options. Good fit for people who need more than a basic replacement battery. Pros: ✅ Strong capacity and CCA specs ✅ Good for higher electrical demand setups ✅ AGM style is appealing for many builds ✅ Nice value compared to some premium brands Cons: ⚠️ Battery fitment and tray compatibility matter ⚠️ Real-world value depends on use case and charging setup Overall, this looks like a strong battery option for the right application. ... show more
Reviewed in the United States on April 3, 2026 by B

  • Horrible product, even worse customer service
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. ... show more
Reviewed in the United States on August 4, 2026 by Peter S.

  • So far, so good.
Style: Group 49
5 stars for the moment. I just received and installed it in my BMW. Perfect match and fit to the factory battery. Car now starts and runs strong again. Real question is how long is it going to last. I'll update my review if anything changes.
Reviewed in the United States on July 16, 2026 by Don

  • Great battery at a great price!!! 😀
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!!! 😀 ... show more
Reviewed in the United States on February 15, 2026 by Kevin C.

  • Good battery
Style: Group 94R
Good battery kinda heavy but does it's job
Reviewed in the United States on August 6, 2026 by Bigdoggdef

  • Good battery and price, but too tall
Style: Group 24
For a battery that is indicated as a replacement for my vehicle, it did fit, but is about an inch taller than stock. I was able to secure the battery hold down strap with a zip tie instead of the stock bolt. The plastic beauty cover over that area of the engine compartment doesn't sit properly, but for the price, this battery is a powerful replacement for the stock one. I don't spend time admiring my car's engine compartment, so I can live with the zip tie and the lifted plastic beauty cover. If the battery can't be secured with a zip tie, your car has serious suspension problems. I would definitely buy this battery again. I shopped around a lot, and this was the best deal. There's nothing better than ordering a car battery from Amazon and having it delivered to your door instead of dealing with the hassle of the auto parts store and their rediculous prices. ... show more
Reviewed in the United States on June 28, 2026 by Thomas Wolf

  • Worth the money.
Style: Group 49
I got this battery for my classic Mercedes sl500. It's trunk mounted, fit perfectly and works as expected. It was much less expensive than other brands.
Reviewed in the United States on July 22, 2026 by Car guy vette

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