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Mighty Max Battery

ML-U1-CCAHR -12 Volt, 320 CCA, Nut and Bolt (NB) Terminal, Rechargeable SLA AGM High Rate Series Battery

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Availability: In Stock.
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Arrives Dec 21 – Dec 22
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Edition: ML-U1-CCAHR


Features

  • ML-U1-CCAHR is a 12V 320 Cold Cranking Amps (CCA) Sealed Lead Acid (SLA) Battery.
  • Dimensions: 7.75 inches x 5.11 inches x 6.25 inches. Polarity: Positive on Left, Negative on Right. Listing is for the Battery and Screws only. No wire harness or mounting accessories included.
  • SLA / AGM spill proof battery has a characteristic of high discharge rate, wide operating temperatures, long service life and deep discharge recover.
  • Compatibility: Craftsman 25780 Lawn Tractor Mower, Cub Cadet LTX 1046 KW Ride Mower, Craftsman ZT7000 Lawn Tractor, Wheel Horse 418 Riding Lawn Mower, Ariens Pro Master 300 Series Mower, Husqvarna Scag Turf Tiger Mower, Dixie Chopper SP 3200 0Turn Mower, Toro Wheel Horse 7-25 Lawn Mower, Toro Timecutter Z5000 Lawn Mower, Bad Boy 6000 Series 300CCA Mower, JohnDeere 330 16 HP 340CCA Mower, John Deere EZtrak Z425 300CCA Mower, Murray Ohio 16HP/42 16 HP Mower, Troy-Bilt 34343 350CCA Lawn Mower
  • Rechargeable battery that can be mounted in any position, resists shocks and vibration. Long lasting high performance in high and low temperatures.

Description

This ML-U1-CCA-HR 12 volts 320 CCA absorbed glass mat (AGM) battery is made with the highest quality pure virgin lead (99.99%) to create a long lasting, durable power source for any machinery requiring a cold cranking power source. The advanced pure lead technology, lower internal resistance and increased plate compression give this battery a longer service life, better deep cycling and overall quicker start-ups for all your lawn and garden machinery. The clever, non-spillable design allows the battery to sit and function in virtually any position increasing your opportunity for ease of mounting. The tough AGM separators and high cell composition increase this battery’s vibration resistance up to 20 times more than that of conventional batteries making it perfect for all your lawn and garden machinery.

Number of Batteries: 1 12V batteries required.


Brand: Mighty Max Battery


Battery Cell Composition: Lead Acid


Battery Capacity: 320 Amp Hours


Recommended Uses For Product: Power Tool


Product Dimensions: 7.75 x 5.11 x 6.25 inches


Item Weight: 14.1 pounds


Item model number: 3878105


Batteries: 1 12V batteries required.


Date First Available: January 1, 2010


Manufacturer: Mighty Max Battery


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Dec 21 – Dec 22

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

    • Right size
Edition: ML-U1-CCAHR
Fit our yard machine riding lawnmower perfectly. Works great
Reviewed in the United States on November 21, 2025 by Margaret Hipp
    • Good Product, Lots of Power
Edition: ML-U1-CCAHR
Battery arrived with the positive terminal crushed. There was no way I could use it because you could not put the bolt through the terminal hole. Contacted Amazon and they said they would send a replacement asap. They said at my convenience, drop the defective battery off at UPS, which I did. Replacement battery came 5 days after I made contact with Amazon. No damage this time. I installed it no problem. Battery was 80% charged when I received it. Trickle charged it overnight to 100%. Starts my garden tractor with no problem. Battery seems to have a lot of power, which is good since I have a snow plow with lights and and a electric lift, which I might have to use soon. I need another battery for one of my other tractors for spring to mow grass. If this battery works out, and I don’t see any reason It would not, I will purchase another one. ... show more
Reviewed in the United States on November 29, 2025 by DK
    • Arrived with leaks, but fully charged
Edition: ML-U1-CCAHR
Review Image by Chaz Turbino Chaz Turbino
I've noticed many others complaining about their Mighty Max batteries arrived with leaks, some with massive leaks, I have a feeling it is due to the manufacturer activating the battery by prefilling with the acid electrolyte solution. Normally AGM batteries from Yuasa intended for powersports/motorcycles come dry because they can be stored for 5 or more years in this manner, and have a separate acid pack that you pour into the battery cells. Those are still AGM. Mine arrived with a lot of leakage at the top, probably spilled out via the vent caps and I noticed some coming out of the potted material at the terminals. It must have tumbled numerous times during the Amazon shipping. The box is marked for proper orientation but when stuffed into an Amazon box, it is going to randomly tumble during shipping. It arrived with just over 12.99 VDC at rest, and I used an Ancel tester to check its capacity. While rated at 320 CCA, it tested at 369 CCA and the Ancel meter said it was at 100%. I used a Battery Tender and a NOCO 10A smart maintainer and both topped off the battery within 5 minutes, so it definitely has a full charge. The U1 size was a perfect fit for the MTD battery that came with my 30" Murray riding mower (the original part number and the superseded MTD part numbers both are discontinued but cross-reference as U1, positive terminal on left). I used the included hardware, but I made some modifications. I added a 1/4" flat washer underneath the screws, and then used a 1/4" internal star locking washer under each nut. This allowed the nut to stay tight on the battery terminal while I tightened down the screw head (10mm drive). The 1/4" washer allows more surface area contact with the terminal and the locking washer obviously keeps the nut tight from the vibration of the lawn mower. The Murray mower had a 1/2" drive screw for the hold down bracket on top of the battery. The last MTD battery was only a 150 CCA unit (10 Ah rated capacity) that lasted over 6 years, mainly because I kept a Battery Tender on it 24/7/365 and was stored outdoors in an unheated garage installed in the mower year-round, and we get down to -20F ambient and up to +100F ambient. So I'm eager to see how long this Mighty Max AGM will last. ... show more
Reviewed in the United States on October 8, 2025 by Chaz Turbino Chaz Turbino
    • Did not last long
Edition: ML-U1-CCAHR
Worked great for 90 days, went open circuit at that point, only 630 mV across the terminals. No idea what went wrong. Happened overnight, after mowing about two hours on a 90 degree day. I wrote the company and did not get a response. I needed another battery so replaced it with a 230 CCA standard battery for $29 at the local box store. Been working fine on that battery ever since. I think they must be good because so many customers like them but that was not my experience in this case. ... show more
Reviewed in the United States on August 2, 2023 by Victor Sombra
    • Better than oem batteries
Edition: ML-U1-CCA
Good battery for my grasshopper mower. Better than the OEM batteries.
Reviewed in the United States on November 24, 2025 by Larry
    • Excellent replacement battery
Edition: ML-U1-CCA
Review Image by Dake58 Dake58
Review Image by Dake58 Dake58
Installed in my Snapper RE100, connected a Deltran Battery Tender Jr. Charged overnight, and so far, works great. Perfect fit, and great value. Would buy again .
Reviewed in the United States on August 28, 2025 by Dake58 Dake58
    • super charged
Edition: ML-U1-CCAHR
great battery .well made good fit lots of power
Reviewed in the United States on October 3, 2025 by jarhead
    • Corrosion out of the box
Edition: ML-U1-CCAHR
Review Image by Tony M. Tony M.
Review Image by Tony M. Tony M.
First off, I’ve bought a few MighyMax batteries in the past and never had any issues. Out of the box, both terminals had corrosion on them. Nothing too bad. Just a little extra work with a wire brush to clean them up. Also, the plastic handle for the battery is useless. It became unconnected when used. Otherwise seems to be a good battery. Meter shows 371CCA when it’s listed as having 320CCA. ... show more
Reviewed in the United States on December 16, 2025 by Tony M. Tony M.

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