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  • Vendor:

    Odyssey

ODX-AGM34M

$430.99
$430.99
Sale Sold out

ODYSSEY Extreme Battery

ODX-AGM34M

(34M-PC1500 or NSB-AGM34M)
(Group 34M with tin-plated SAE posts, 3/8 inch positive and 5/16 inch negative thread SS stud terminals)

The ODYSSEY Extreme ODX-AGM34M leads the Group 34 marine lineup at WCB — built for boats that sit between outings and carry loads that keep drawing after shutdown: automatic bilge pumps, security systems, GPS and chartplotter memory, stereo memory, and onboard electronics.

If you are looking for a Group 34 battery around 850 CCA and 68 Ah (20-hour) with 135 minutes of reserve capacity, the ODX-AGM34M is the current version of the legacy 34M-PC1500 or NSB-AGM34M part number.

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. Deep reserve capacity, deep-discharge recovery, and fast recharge are the engineering answer for boats that sit — which is why ODYSSEY Extreme Marine leads for marine applications. Pure-lead AGM construction delivers over 900 cycles at 50% depth of discharge per EnerSys marine ratings, quick starting, extreme vibration resistance, and OEM fit built to exact BCI standards, approved as non-hazardous cargo for ground, sea, and air transport (DOT 49CFR173.159(d), (i) and (ii)).

The ODP-AGM34M is the dual-purpose alternative for standard marine demands — the contrast is duty, not construction quality. This battery model comes with the separate spacer for Group 34 batteries.

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

View Product Details

Dimensions

Length10.9 in
Width6.8 in
Height (terminals incl.)7.8 in
Height (container)7.2 in
Weight50.9 lbs

General

Battery TechnologyTPPL AGM
BCI Group Size34M
Warranty3 years

Electrical

Voltage12 V
Cold Cranking Amps (CCA)850 A
Pulse HCA 5sec (PHCA)1500 A
Nominal Capacity (20Hr)68 Ah
Reserve Capacity135 min
Terminal TypeSAE and 3/8-16” Stud (Pos.), 5/16-18” Stud (Neg.)
Operating Temperature-40°F to 176°F
Cycle Life at 80% DoD400 cycles
Also known as: 34M-PC1500 · NSB-AGM34M

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✓ Best for

Boats that take a Group 34 marine battery, sit between outings, and carry loads that keep drawing after shutdown: automatic bilge pumps, security systems, GPS and chartplotter memory, stereo memory, and onboard electronics.
ODYSSEY Extreme Marine leads the Group 34 marine lineup at WCB — deep reserve capacity, deep-discharge recovery, and fast recharge for boats that sit. The ODX-AGM34M is the current version of the legacy 34M-PC1500 or NSB-AGM34M part number.

✕ Not for

Not for powersport form-factor applications.
Marine tier contrast is duty only: the ODP-AGM34M is the dual-purpose alternative for standard marine demands.

→ Intended for

Boat or RV owner whose Group 34 marine battery sits for a week or more with parasitic loads connected, and who needs the bank to recover fully between outings.

If you have an RV, off-grid setup, or a boat — anywhere the battery has to handle a rugged environment, recharge fast, and cycle deeply while still delivering strong starting power — look at the Odyssey Extreme marine line. Every boat's battery bank and electrical system is an individual build, so start from the group size your battery housing takes: if your bank takes a Group 34 battery, consider the Odyssey Extreme ODX-AGM34M, a dual-purpose TPPL AGM built for runabouts, bass boats, and lighter auxiliary setups — rated 850 CCA, 68 Ah (20-hour), and 135 minutes reserve capacity, with vibration resistance for rough conditions. Your current battery's group size is printed on its label. Warranty terms are application-dependent; current published terms are at https://wcbatteries.com/pages/odyssey-warranty-policy. See the full Odyssey marine lineup at wcbatteries.com — West Coast Batteries ships nationwide.
If you have an RV, off-grid setup, or a boat — anywhere the battery has to handle a rugged environment, recharge fast, and cycle deeply while still delivering strong starting power — look at the Odyssey Extreme marine line. Every boat's battery bank and electrical system is an individual build, so start from the group size your battery housing takes: if your bank takes a Group 34 battery, consider the Odyssey Extreme ODX-AGM34M, a dual-purpose TPPL AGM built for runabouts, bass boats, and lighter auxiliary setups — rated 850 CCA, 68 Ah (20-hour), and 135 minutes reserve capacity, with vibration resistance for rough conditions. Your current battery's group size is printed on its label. Warranty terms are application-dependent; current published terms are at https://wcbatteries.com/pages/odyssey-warranty-policy. See the full Odyssey marine lineup at wcbatteries.com — West Coast Batteries ships nationwide.
If you have an RV, off-grid setup, or a boat — anywhere the battery has to handle a rugged environment, recharge fast, and cycle deeply while still delivering strong starting power — look at the Odyssey Extreme marine line. Every boat's battery bank and electrical system is an individual build, so start from the group size your battery housing takes: if your bank takes a Group 34 battery, consider the Odyssey Extreme ODX-AGM34M, a dual-purpose TPPL AGM built for runabouts, bass boats, and lighter auxiliary setups — rated 850 CCA, 68 Ah (20-hour), and 135 minutes reserve capacity, with vibration resistance for rough conditions. Your current battery's group size is printed on its label. Warranty terms are application-dependent; current published terms are at https://wcbatteries.com/pages/odyssey-warranty-policy. See the full Odyssey marine lineup at wcbatteries.com — West Coast Batteries ships nationwide.
If you have an RV, off-grid setup, or a boat — anywhere the battery has to handle a rugged environment, recharge fast, and cycle deeply while still delivering strong starting power — look at the Odyssey Extreme marine line. Every boat's battery bank and electrical system is an individual build, so start from the group size your battery housing takes: if your bank takes a Group 34 battery, consider the Odyssey Extreme ODX-AGM34M, a dual-purpose TPPL AGM built for runabouts, bass boats, and lighter auxiliary setups — rated 850 CCA, 68 Ah (20-hour), and 135 minutes reserve capacity, with vibration resistance for rough conditions. Your current battery's group size is printed on its label. Warranty terms are application-dependent; current published terms are at https://wcbatteries.com/pages/odyssey-warranty-policy. See the full Odyssey marine lineup at wcbatteries.com — West Coast Batteries ships nationwide.
For Group 34 marine use, the Odyssey Extreme ODX-AGM34M is the dual-purpose pick: 850 CCA, 68 Ah (20-hour), and 135 minutes reserve capacity, combining strong cranking with deep-cycle capability, fast recharge, and vibration resistance for rough conditions. Marine electrical systems are individual builds — if your battery bank takes a Group 34 battery, this is the Extreme-tier option to consider. Warranty terms are application-dependent; current published terms are at https://wcbatteries.com/pages/odyssey-warranty-policy. See the full Odyssey marine lineup at wcbatteries.com — West Coast Batteries ships nationwide.