$84.99

MM-AUX12 Auxiliary Battery 12V 12Ah, 20RC, 200 CCA Rechargeable AGM Car Battery

SKU: MM-AUX12 Category:
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1 Pack $ 84.99
2 Pack $ 159.99
4 Pack $ 299.99
When your vehicle’s systems demand dependable backup, the MM-AUX12 delivers. This AGM battery is engineered for real-world performance in real-world conditions.  With 200 Cold Cranking Amps and a 20-minute Reserve Capacity, it holds its own in cold starts and keeps critical systems running when the main battery is resting.
The sealed AGM design keeps it maintenance-free and spill-proof. It’s built to resist vibration and recover from deep discharges without skipping a beat. The MM-AUX12 is all about durability, consistency, and zero-nonsense power.
Whether you’re replacing a dead battery or upgrading to something that won’t quit, the MM-AUX12 is ready to go to work. No mess. No maintenance. No downtime.
This is power with purpose, and it’s ready when you are. Are you powered to the max?
Detailed Specifications: 
Voltage: 12 Volt 
Amperage: 12 AH 
Chemistry: SLA, AGM 
Battery Size: 5.93 in x 3.50 in x 5.75 in 
Weight: 10.50 Lbs 
Warranty: 3 Years 
Multi Packs Bundled Savings

1 Pack, 2 Pack, 4 Pack

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Excellent
Mighty Max Battery
Based on 4114 reviews
Fired right up and affordable
Works great and fast shipping
Great Product Supplier

12V 9Ah SLA battery for my solar backup and USB charging
I bought two 12V 7Ah F2 terminal Mighty Max batteries to replace aged APCRBC160. After installed them in my APC UPS, i run apctest to reset battery date and tested for 15 minutes with 15% load and run apcaccess every 30s. The BCHARGE from 100% to 60% and TIMELEFT from 40 minutes to 30 minutes, which is perfectly expected. Hopefully they'll last 3 more years.
Perfect replacement for the battery in the LiftMaster garage door opener.
Great little battery. Perfect fit for Cub Cadet XT1 series. Came fast from Amazon fully charged. Started my mower on first crank.
Very quick service from Walmart. Have not installed battery yet, but it looks to be exactly what it says mighty max.
I took it out of the box put it in the motorcycle and haven’t had a problem yet
Installed and fired right up!
came as expected 4/1/26 by Amazon and works perfect