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 4138 reviews
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Stephen Wagoner
Needed a new battery to start off the mowing season! Thanks Mighty Max!
Larry Dyck
Arrived just fine. Installed into my Chamberlain door opener. Fit just fine. Have yet to see if it works.
RamSar
Great choice👍🏻
Mike Hinsley
Purchased a MightyMax YB9A-A battery for a Kipor Sinemaster KGE 3000Yi digital generator. The battery fit perfectly and started the generator with no issues. The price was very reaonable and everything works great!
Dylan Davis
Can't speak for longevity, but battery was delivered at the promised voltage and CCA. For the price it's worth the try — will update my review if any premature failures occur.
James Miller
The ML9-12 NB battery was purchased for a replacement battery for my generator. It was charged and ready to go out of the box. The 2 bolts that were included for the terminals were a nice surprise.
Carlo Perri
Great product
Shipped securely
Faye Frost
I just reordered my mighty max. I'm replacing the one from 2 years ago. I believe that's pretty good for a battery like this. Always starts my mower right up.
charles Ingstad
Purchased from Amazon to use in my Polaris quad.
Andrew King
Great item. Just the right size.

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