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12V 1150MCA Group 31 AGM Starting Battery
SKU PGM31MX1150
Sealed AGM. Spill-proof, maintenance-free power.
1150 MCA starting power.
Starting power in a Group 31 case.
Sealed, maintenance-free AGM.
Spill-proof construction with no watering or electrolyte checks.
18 Month Warranty.
Full terms are on our warranty information page.
U.S.-based support.
Battery expertise since 1980, with a team you can call.
As low as$36/mo with
Complete your setup
Fits the PGM31MX1150-
PGC-116 On-Board Charger · 12/16VOn-board charging with lithium and AGM profiles.
$179.99
-
Battery Box · Group 31Sized to a Group 31 battery.
$19.99
-
NOCO Battery Tray · Group 31Holds a Group 31 battery secure.
$9.99
-
NOCO Jump Starter · 12V 1000APortable backup start if a battery runs flat.
$119.99
The 31MX1150 AGM (Absorbent Glass Mat) marine starting battery is a high-performance power source designed specifically for marine applications, offering superior starting power and durability. Engineered with advanced AGM technology, these batteries are optimized to provide reliable engine starts, even in demanding marine environments.
Will it fit your setup?
Three quick checks before you order: your tray size, your cable connections and your charger. Everything you need is below.
Dimensions
- Length
- 13in / 330mm
- Width
- 6 13/16in / 173mm
- Height
- 8 7/8in / 225mm
- Weight
- 60lbs / 27kg
- Group size
- 31
Measure your battery tray or the battery you are replacing. If your tray takes a Group 31 battery this size, it drops in with no tray modification needed.
What you'll need to install
A Group 31 tray or battery box
The matching box and tray are in Complete your setup.
Your existing battery cables
Reuse them if the cable ends fit the battery's terminals (1 SAE Post, 1 Stud terminal).
An AGM-compatible charger
Use a charger with an AGM charging mode. The 12/16V 10A 1-Bank Battery Charger in Complete your setup pairs with it.
Basic hand tools
A wrench or socket for the terminal hardware.
Still not sure? Our US-based team will check it with you. 1-800-827-3232
- Weight: 60lbs / 27kg
- Backed by 45 years of battery expertise and US-based support you can actually reach.
- 18 months free replacement warranty included.
| Group Size | 31 |
|---|---|
| Voltage | 12 |
| Cold Cranking Amps | 925 CCA |
| Marine Cranking Amps | 1150 MCA |
| Amp Hour Capacity | N/A |
| Charge Current (Standard / Max) | 10A / 20A |
| Terminal Type | 1 SAE Post, 1 Stud terminal |
| Weight ( lbs / kg) | 60lbs / 27kg |
| Length (in / mm) | 13in / 330mm |
| Width (in / mm) | 6 13/16in / 173mm |
| Height (in / mm) | 8 7/8in / 225mm |
Shipping
Free ground shipping on this item, typically delivered within 24 to 48 hours. Oversized and freight items note any exception on the product page itself.
Warranty
18 months free replacement warranty included.
Register your battery online to activate coverage. Full terms are on the warranty information page.
Downloadable Resources
Engineered for Extreme Heat & Cold
Wide Temperature Range
Low Self Discharge, Ready When You Are
Exceptional Charge Retention
Long-Term Reliability:
Power That Doesn't Quit
Providing reliable batteries since 1980:
Innovating Power for 45 Years.
ProGuide AGM vs Other Batteries
Frequently Asked Questions
What is an AGM starting battery designed for?
AGM starting batteries are designed to provide strong cranking power for starting marine engines and other equipment while offering a sealed, maintenance-free design.
What does MCA mean?
Marine Cranking Amps, or MCA, measures the battery's ability to deliver starting current under marine temperature conditions. Compare the battery's MCA rating with the requirements specified by your engine manufacturer.
Can an AGM starting battery also power electronics?
It can support normal onboard loads, but if your electronics draw substantial power while the engine is off, a dedicated house/deep-cycle battery or dual-purpose solution may be more appropriate.
Does an AGM battery need water?
No. AGM batteries are sealed and do not require periodic water refilling.
What charger should I use?
Use a quality charger with an AGM charging profile and the correct voltage for the battery.