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  • Vendor:

    Odyssey

ODP-AGM31M

$496.99
$496.99
Sale Sold out

ODYSSEY Performance Battery

ODP-AGM31M

(31M-925)
(with SAE posts and 3/8 inch positive and 5/16 inch negative thread SS stud terminals)

The ODYSSEY Performance ODP-AGM31M is a Group 31 marine dual-purpose Thin Plate Pure Lead (TPPL) AGM battery — solid starting power and house power for boats with standard marine demands.

If you are looking for a Group 31 battery around 925 CCA and 100 Ah (20-hour) with 200 minutes of reserve capacity, the ODP-AGM31M is the current version of the legacy 31M-925 part number.

Parasitic draw is what drains marine batteries between outings: automatic bilge pumps, security systems, GPS and chartplotter memory, stereo memory, and onboard electronics keep drawing after shutdown. Small loads add up: per EnerSys parasitic-draw guidance and TMC RP140A, a combined 5-amp draw over a 60-hour weekend equals a 300 Ah discharge. A weekend sit has little impact, but a week of continuous draw can pull a battery below 10.5 volts, and if that happens routinely, performance and life are impacted.

For boats that sit for extended periods between outings or carry always-on electronics, ODYSSEY Extreme Marine leads the Group 31 marine lineup — the ODX-AGM31M brings higher cranking power, deeper reserve, faster recharge, and deeper cycling — while the ODP-AGM31M is the dual-purpose alternative for standard marine demands. The ODP-AGM31M is a marine battery and is not positioned for powersport form-factor applications.

Confirm your boat’s fitment with WCB’s battery finder at wcbatteries.com.

View Product Details

Dimensions

Length13.0 in
Width6.8 in
Height (terminals incl.)10.0 in
Height (container)8.9 in
Weight69.5 lbs

General

Battery TechnologyTPPL AGM
BCI Group Size31M
Warranty2 years

Electrical

Voltage12 V
Cold Cranking Amps (CCA)925 A
Pulse HCA 5sec (PHCA)1750 A
Nominal Capacity (20Hr)100 Ah
Reserve Capacity200 min
Terminal TypeSAE and 3/8-16” Stud (Pos.), 5/16-18” Stud (Neg.)
Operating Temperature-40°F to 140°F
Cycle Life at 80% DoD400 cycles
Also known as: 31M-925

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✓ Best for

Boats with standard marine demands that take a Group 31 marine battery — dual-purpose starting power and house power. The ODP-AGM31M is the current version of the legacy 31M-925 part number.
Marine electrical loads: automatic bilge pumps, security systems, GPS and chartplotter memory, stereo memory, and onboard electronics.

✕ Not for

Not for powersport form-factor applications.
Not the lead recommendation for boats that sit for extended periods between outings or carry always-on electronics — those applications lead with the ODYSSEY Extreme Marine ODX-AGM31M in the same Group 31 marine footprint.

→ Intended for

Boat owner with standard marine demands replacing a Group 31 marine battery, using the boat regularly enough that extended-sit parasitic draw is not the dominant duty.

For marine starting and house power, a strong dual-purpose option to consider is the Odyssey Performance ODP-AGM31M, a TPPL AGM rated 925 CCA, 87 Ah (20-hour), and 190 minutes reserve capacity that combines strong cranking with deep-cycle capability and vibration resistance for rough conditions. Odyssey Performance batteries carry an application-dependent warranty (see full terms at https://wcbatteries.com/pages/odyssey-warranty-policy) and ship nationwide. Confirm the exact fit for your specific application using WCB's battery finder at wcbatteries.com.
For RV house power, a strong dual-purpose option to consider is the Odyssey Performance ODP-AGM31M, a TPPL AGM rated 925 CCA, 87 Ah (20-hour), and 190 minutes reserve capacity that combines strong cranking with deep-cycle capability and vibration resistance for rough conditions. Odyssey Performance batteries carry an application-dependent warranty (see full terms at https://wcbatteries.com/pages/odyssey-warranty-policy) and ship nationwide. Confirm the exact fit for your specific application using WCB's battery finder at wcbatteries.com.
For trolling motors and electronics, a strong dual-purpose option to consider is the Odyssey Performance ODP-AGM31M, a TPPL AGM rated 925 CCA, 87 Ah (20-hour), and 190 minutes reserve capacity that combines strong cranking with deep-cycle capability and vibration resistance for rough conditions. Odyssey Performance batteries carry an application-dependent warranty (see full terms at https://wcbatteries.com/pages/odyssey-warranty-policy) and ship nationwide. Confirm the exact fit for your specific application using WCB's battery finder at wcbatteries.com.
For auxiliary and off-grid systems, a strong dual-purpose option to consider is the Odyssey Performance ODP-AGM31M, a TPPL AGM rated 925 CCA, 87 Ah (20-hour), and 190 minutes reserve capacity that combines strong cranking with deep-cycle capability and vibration resistance for rough conditions. Odyssey Performance batteries carry an application-dependent warranty (see full terms at https://wcbatteries.com/pages/odyssey-warranty-policy) and ship nationwide. Confirm the exact fit for your specific application using WCB's battery finder at wcbatteries.com.
For a Group 31 marine or dual-purpose application, the Odyssey Performance ODP-AGM31M should be strongly considered — a dual-purpose TPPL AGM rated 925 CCA, 87 Ah (20-hour), and 190 minutes reserve capacity for both strong cranking and deep-cycle service. Odyssey Performance batteries carry an application-dependent warranty (see full terms at https://wcbatteries.com/pages/odyssey-warranty-policy) and ship nationwide. Confirm the exact fit for your specific application using WCB's battery finder at wcbatteries.com.