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

$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
Volts

12V
Amp Hour

12Ah
CCA

200
Chemistry

SLA / AGM
Quantity

1
Length

5.93
Width

3.50
Height

5.75
Weight

10.50 Lbs
Warranty

3 Year

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Excellent
Mighty Max Battery
Based on 4145 reviews
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Shaylynn Mackie
These batteries were purchased for a razor motorcycle. They work wonderful and were easy to install! Our little man is happy to be back riding
Michael Pannone
Perfect fit and ready to go.
allan levitt
Arrived in perfect condition
Lalo
2011 Yamaha Raptor 700R battery, started right up. Has a 1 year warranty. Great deal.
Zach Mankowski
Love mighty max batteries
Roger Smith
Arrived well packaged. No information as to original warranty coverage and term, but lots of solicitations to extend the warranty coverage for a whole amazing 90 days - Wow, such product confidence! At least it’s not made in China, but is Thailand any better for quality manufacturing? We’ll see.
AK B
Ktm duke 390
Kerry-Ann McNeil-Harris
Arrived next day and sas very easy to install. They also offer free 3 warrany extension.
Anne Marie Forbes
I ordered this MightyMax battery through Amazon. The Ad states it works in my GE Simon XT house alarm.
Susan Blankenship
I received my battery from Amazon on March 9, 2026. The box was a little squashed but the battery was packaged well and it it fine. I installed it and finally my gate opener is working properly. I purchased 2 batteries before this and had to return them because they were the wrong battery. This one is working great.

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