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ODYSSEY ODX-AGM8DKT Extreme Marine Dual Purpose AGM battery (12 V, 228 Ah)

By ODYSSEYSKU ODX-AGM8DKT

DC battery module12 V228 Ah
Evidence score4/100Missing details
No owner reviews yet · Write the first
Basic specsUnknownDischargeUnknownChargeUnknown$ / rated kWhUnavailableWarranty4 yearsSee termsLifetime productionNot publishedSize35.83 L*Value needs confirmation: ODYSSEY documents print different dimensionsW: 283 × H: 243 × L: 521 mm85 kg187.39 lbCertificatesNone on fileEvidence missing

Key specs

Units
SKU
ODX-AGM8DKT
Official product page
Sources

Printed as "ODX-AGM8DKT" in the product page heading, with "SMS-AGM8DK-S" in brackets.

Official product page: ODYSSEY ODX-AGM8DKT product page, odysseybattery.com Checked · Earlier document

Location: Product page heading

Documented

Chemistry
AGM
Official instruction manual
Sources

The manual prints "ODYSSEY batteries are manufactured by EnerSys using its unique Absorbed Glass Mat (AGM) Thin Plate Pure Lead (TPPL) technology" for every ODYSSEY battery; the flyer that lists this part number prints "Construction Thin Plate Pure Lead (TPPL) Absorbed Glass Mat (AGM)".

Official instruction manual: ODYSSEY Installation, Operation and Maintenance Manual (GLOB-EN-IOM-ODY-0826) Rev GLOB-EN-IOM-ODY-0826 · Checked · Earlier documentOfficial document: ODYSSEY Marine Dual Purpose batteries flyer (AMER-EN-FLY-ODY-MARINE-0325) Rev AMER-EN-FLY-ODY-MARINE-0325 · Checked · Earlier document

Location: Installation, Operation and Maintenance Manual, page 3, I. Introduction; flyer page 2, Construction

Documented

Nominal voltage
12 V
Official product page
Sources

Printed as "Voltage 12" on the product page.

Official product page: ODYSSEY ODX-AGM8DKT product page, odysseybattery.com Checked · Earlier document

Location: Product page, Specifications, Voltage

Documented

Rated capacity
228 Ah
Official product page
Sources

Printed as "20Hr Nominal Capacity (Ah) 228" on the product page and "Reserve Capacity Minutes 500". ODYSSEY's specifications table does not list this part number.

Official product page: ODYSSEY ODX-AGM8DKT product page, odysseybattery.com Checked · Earlier document

Location: Product page, Specifications, 20Hr Nominal Capacity (Ah)

Documented

Battery weight
85 kg190 lb converted
Official document
Sources

Printed as 187 (85.0) in the "Weight [lb (kg)]" column of ODYSSEY's marine flyer; the product page prints "Weight 187 lbs". ODYSSEY's specifications table does not list this part number.

Official document: ODYSSEY Marine Dual Purpose batteries flyer (AMER-EN-FLY-ODY-MARINE-0325) Rev AMER-EN-FLY-ODY-MARINE-0325 · Checked · Earlier documentOfficial product page: ODYSSEY ODX-AGM8DKT product page, odysseybattery.com Checked · Earlier document

Location: Flyer page 2, ODX-AGM8DKT row, Weight [lb (kg)] column; product page, Dimensions

Documented

Dimensions
35.83 L
Calculated: Enclosure volume: W × H × D ÷ 1,000,000
ODYSSEY documents print different dimensions

The primary source prints 521 x 283 x 243 mm for ODX-AGM8DKT; the recreational vehicle flyer prints 521 x 279 x 239 mm.

W: 283 × H: 243 × L: 521 mmW: 11.1 × H: 9.57 × L: 20.5 in convertedOfficial document
Sources

Printed in ODYSSEY's marine flyer in inches with millimeters in brackets; the millimeter figures are recorded and the height is the maximum total height. The product page prints no usable dimensions.

279 W × 239 H × 521 L mm

ODYSSEY's recreational vehicle flyer prints 521 x 279 x 239 mm (length, width, maximum total height) for ODX-AGM8DKT.

Official document: ODYSSEY batteries for recreational vehicles flyer (AMER-EN-FLY-ODY-RV-1222) Rev AMER-EN-FLY-ODY-RV-1222 · Checked · Earlier document
Official document: ODYSSEY Marine Dual Purpose batteries flyer (AMER-EN-FLY-ODY-MARINE-0325) Rev AMER-EN-FLY-ODY-MARINE-0325 · Checked · Earlier document

Location: Flyer page 2, ODX-AGM8DKT row, Maximum Length, Width and Total Height columns

Calculated

Terminals
3/8-16" Stud
Official product page
Sources

Printed as "Terminal 3/8-16" Stud" on the product page.

Official product page: ODYSSEY ODX-AGM8DKT product page, odysseybattery.com Checked · Earlier document

Location: Product page, Specifications, Terminal

Documented

Use cases
Marine
Official document
Sources

ODYSSEY's marine flyer prints "ODYSSEY Marine Dual Purpose batteries are ideal for trolling, starting and for powering the many onboard electronic accessories common in today's boats" and lists ODX-AGM8DKT in its page 2 table. The label is the maker's own word: Marine from "Marine Dual Purpose".

Official document: ODYSSEY Marine Dual Purpose batteries flyer (AMER-EN-FLY-ODY-MARINE-0325) Rev AMER-EN-FLY-ODY-MARINE-0325 · Checked · Earlier document

Location: Marine flyer, page 1 and the page 2 table

Documented

Cold cranking
2,250 A
Official product page
Sources

Printed as "Cold Cranking Amps (CCA) 2250" on the product page.

Official product page: ODYSSEY ODX-AGM8DKT product page, odysseybattery.com Checked · Earlier document

Location: Product page, Specifications, Cold Cranking Amps (CCA)

Documented

2 specs not documented yet: nominal energy, usable energyHelp fill in ›

All specs12
Chemistry
AGM
Official instruction manual
Sources

The manual prints "ODYSSEY batteries are manufactured by EnerSys using its unique Absorbed Glass Mat (AGM) Thin Plate Pure Lead (TPPL) technology" for every ODYSSEY battery; the flyer that lists this part number prints "Construction Thin Plate Pure Lead (TPPL) Absorbed Glass Mat (AGM)".

Official instruction manual: ODYSSEY Installation, Operation and Maintenance Manual (GLOB-EN-IOM-ODY-0826) Rev GLOB-EN-IOM-ODY-0826 · Checked · Earlier documentOfficial document: ODYSSEY Marine Dual Purpose batteries flyer (AMER-EN-FLY-ODY-MARINE-0325) Rev AMER-EN-FLY-ODY-MARINE-0325 · Checked · Earlier document

Location: Installation, Operation and Maintenance Manual, page 3, I. Introduction; flyer page 2, Construction

Documented

Nominal energy
Not documented
Usable energy
Not documented
Nominal voltage
12 V
Official product page
Sources

Printed as "Voltage 12" on the product page.

Official product page: ODYSSEY ODX-AGM8DKT product page, odysseybattery.com Checked · Earlier document

Location: Product page, Specifications, Voltage

Documented

Rated capacity
228 Ah
Official product page
Sources

Printed as "20Hr Nominal Capacity (Ah) 228" on the product page and "Reserve Capacity Minutes 500". ODYSSEY's specifications table does not list this part number.

Official product page: ODYSSEY ODX-AGM8DKT product page, odysseybattery.com Checked · Earlier document

Location: Product page, Specifications, 20Hr Nominal Capacity (Ah)

Documented

Lifetime production

Not published

Published claims and calculations are not independently tested lifetime output.

Published claims and calculations, not independent test results.

Documents

3 on file
  • PDF
    ODYSSEY Installation, Operation and Maintenance Manual (GLOB-EN-IOM-ODY-0826)OfficialEnerSys (ODYSSEY Battery)Official instruction manual
    Source details
    Revision
    GLOB-EN-IOM-ODY-0826
    Revision date
    Not stated

    Archived copy captured on 2026-10-30.

    Location: Page 3, I. Introduction

    Retrieved

    ODYSSEY's installation, operation and maintenance manual for its AGM2 (TPPL) batteries (document GLOB-EN-IOM-ODY-0826), from odysseybattery.com, captured on October 30, 2026. It covers every ODYSSEY battery: construction, installation, torque by terminal type, charging, storage and testing. It prints no per-model capacity. Manufacturer claims, not independent tests.

    Archived copies

    Archived copy of a document published by EnerSys (ODYSSEY Battery). Copyright retained by the publisher; kept for reference and verification only, no endorsement implied. To ask for its removal, email legal@chargedreviews.com.

    Archived backup Revision not recorded · 0.57 MB

    Archived copy, unaltered, kept as a record of what EnerSys (ODYSSEY Battery) published. Original address: https://www.odysseybattery.com/wp-content/uploads/sites/2/odyssey-installation-operation-and-maintenance-manual.pdf. Copyright and takedown

    Source first found
    This copy captured
    Archived
    File detailsOriginal source
    Pages
    18
    Embedded creation date
    Aug 28, 2026
    Embedded modification date
    Aug 28, 2026

    Embedded dates are file metadata, not independent proof of publication.

    SHA-256: ef19101e83d774ad8cf232fa0944ab4630d6fa17b2559bfd59414fe76cfd6292

    Open
  • PDF
    ODYSSEY Batteries General Product Limited Warranty, North America (AMER-EN-W-ODY-0626)OfficialEnerSys (ODYSSEY Battery)Official warranty
    Source details
    Revision
    AMER-EN-W-ODY-0626
    Revision date
    Not stated

    Archived copy captured on 2026-10-30.

    Location: Page 1, What is covered by the Warranty?

    Retrieved

    ODYSSEY's general product limited warranty for North America (document AMER-EN-W-ODY-0626), issued by EnerSys Energy Products Inc., from odysseybattery.com, captured on October 30, 2026. It sets the warranty period by part number prefix and reduces it by one year for marine batteries whose model numbers end with M. Warranty terms, not test results.

    Archived copies

    Archived copy of a document published by EnerSys (ODYSSEY Battery). Copyright retained by the publisher; kept for reference and verification only, no endorsement implied. To ask for its removal, email legal@chargedreviews.com.

    Archived backup Revision not recorded · 0.14 MB

    Archived copy, unaltered, kept as a record of what EnerSys (ODYSSEY Battery) published. Original address: https://www.odysseybattery.com/wp-content/uploads/sites/2/odyssey-battery-general-product-limited-warranty.pdf. Copyright and takedown

    Source first found
    This copy captured
    Archived
    File detailsOriginal source
    Pages
    2
    Embedded creation date
    Jun 9, 2026
    Embedded modification date
    Jun 9, 2026

    Embedded dates are file metadata, not independent proof of publication.

    SHA-256: 62a4e92be8886ac8514b5f1cf2a41972a6c47270f14782ca63222b3cd484c740

    Open
  • WEB
    ODYSSEY ODX-AGM8DKT product page, odysseybattery.comOfficialEnerSys (ODYSSEY Battery)Official product page
    Source details
    Revision
    Not stated
    Revision date
    Not stated

    Archived copy captured on 2026-10-30.

    Location: Product description; Dimensions; Specifications

    Retrieved

    ODYSSEY's own product and store page for the ODX-AGM8DKT on its United States site, captured on October 30, 2026. It prints the part number, a description of the battery's use, dimensions and weight in inches and pounds, voltage, cranking currents, capacity at the 20 hour rate, reserve capacity, terminal, torque and internal resistance, and the store's shipping area. Manufacturer claims, not independent tests.

    Open

Archive and older revisions

Archive and older revisions2

Earlier revisions, archived captures and copies published by someone other than the manufacturer. Every one stays reachable.

  • PDF
    ODYSSEY Marine Dual Purpose batteries flyer (AMER-EN-FLY-ODY-MARINE-0325)OfficialEnerSys (ODYSSEY Battery)Official document
    Source details
    Revision
    AMER-EN-FLY-ODY-MARINE-0325
    Revision date
    Not stated

    Archived copy captured on 2026-10-30.

    Location: Page 2 tables

    Retrieved

    ODYSSEY's two-page flyer for marine applications (document AMER-EN-FLY-ODY-MARINE-0325, "(c) 2025 EnerSys"), from the ODYSSEY literature library on odysseybattery.com, captured on October 30, 2026. Page 1 describes ODYSSEY Marine Dual Purpose batteries; page 2 prints construction, warranty and a table of PHCA, MCA, 20 hour capacity, reserve capacity, dimensions, weight and terminal torque for Performance and Extreme part numbers. Manufacturer claims, not independent tests.

    Archived copies

    Archived copy of a document published by EnerSys (ODYSSEY Battery). Copyright retained by the publisher; kept for reference and verification only, no endorsement implied. To ask for its removal, email legal@chargedreviews.com.

    Archived backup Revision not recorded · 0.42 MB

    Archived copy, unaltered, kept as a record of what EnerSys (ODYSSEY Battery) published. Original address: https://www.odysseybattery.com/wp-content/uploads/sites/2/amer-odyssey-batteries-for-marine-applications.pdf. Copyright and takedown

    Source first found
    This copy captured
    Archived
    File detailsOriginal source
    Pages
    2
    Embedded creation date
    Mar 27, 2025
    Embedded modification date
    Mar 27, 2025

    Embedded dates are file metadata, not independent proof of publication.

    SHA-256: d5462ba30d1035fecb77dded598064ea9e185b85c54853a004dd9611b7e64db1

    Open
  • PDF
    ODYSSEY batteries for recreational vehicles flyer (AMER-EN-FLY-ODY-RV-1222)OfficialEnerSys (ODYSSEY Battery)Official document
    Source details
    Revision
    AMER-EN-FLY-ODY-RV-1222
    Revision date
    Not stated

    Archived copy captured on 2026-10-30.

    Location: Page 2 tables

    Retrieved

    ODYSSEY's two-page flyer for recreational vehicles (document AMER-EN-FLY-ODY-RV-1222, "(c) 2022 EnerSys"), from the ODYSSEY literature library on odysseybattery.com, captured on October 30, 2026. Page 1 says ODYSSEY batteries pack starting power and deep cycle reserve power; page 2 prints PHCA, MCA, 20 hour capacity, reserve capacity, dimensions and weight for Extreme and Performance part numbers. Manufacturer claims, not independent tests.

    Archived copies

    Archived copy of a document published by EnerSys (ODYSSEY Battery). Copyright retained by the publisher; kept for reference and verification only, no endorsement implied. To ask for its removal, email legal@chargedreviews.com.

    Archived backup Revision not recorded · 0.22 MB

    Archived copy, unaltered, kept as a record of what EnerSys (ODYSSEY Battery) published. Original address: https://www.odysseybattery.com/wp-content/uploads/sites/2/odyssey-batteries-for-recreational-vehicles.pdf. Copyright and takedown

    Source first found
    This copy captured
    Archived
    File detailsOriginal source
    Pages
    2
    Embedded creation date
    Dec 22, 2022
    Embedded modification date
    Dec 22, 2022

    Embedded dates are file metadata, not independent proof of publication.

    SHA-256: d14c8c36a1f436bd4cbd89ba47399154edfa8ac91bae91803efa78657cfe4384

    Open

Archived documents

ODYSSEY Marine Dual Purpose batteries flyer (AMER-EN-FLY-ODY-MARINE-0325)

Archived copy of a document published by EnerSys (ODYSSEY Battery). Copyright retained by the publisher; kept for reference and verification only, no endorsement implied. To ask for its removal, email legal@chargedreviews.com.

Archived backup Revision not recorded · 0.42 MB

Archived copy, unaltered, kept as a record of what EnerSys (ODYSSEY Battery) published. Original address: https://www.odysseybattery.com/wp-content/uploads/sites/2/amer-odyssey-batteries-for-marine-applications.pdf. Copyright and takedown

Source first found
This copy captured
Archived
File detailsOriginal source
Pages
2
Embedded creation date
Mar 27, 2025
Embedded modification date
Mar 27, 2025

Embedded dates are file metadata, not independent proof of publication.

SHA-256: d5462ba30d1035fecb77dded598064ea9e185b85c54853a004dd9611b7e64db1

ODYSSEY batteries for recreational vehicles flyer (AMER-EN-FLY-ODY-RV-1222)

Archived copy of a document published by EnerSys (ODYSSEY Battery). Copyright retained by the publisher; kept for reference and verification only, no endorsement implied. To ask for its removal, email legal@chargedreviews.com.

Archived backup Revision not recorded · 0.22 MB

Archived copy, unaltered, kept as a record of what EnerSys (ODYSSEY Battery) published. Original address: https://www.odysseybattery.com/wp-content/uploads/sites/2/odyssey-batteries-for-recreational-vehicles.pdf. Copyright and takedown

Source first found
This copy captured
Archived
File detailsOriginal source
Pages
2
Embedded creation date
Dec 22, 2022
Embedded modification date
Dec 22, 2022

Embedded dates are file metadata, not independent proof of publication.

SHA-256: d14c8c36a1f436bd4cbd89ba47399154edfa8ac91bae91803efa78657cfe4384

ODYSSEY Installation, Operation and Maintenance Manual (GLOB-EN-IOM-ODY-0826)

Archived copy of a document published by EnerSys (ODYSSEY Battery). Copyright retained by the publisher; kept for reference and verification only, no endorsement implied. To ask for its removal, email legal@chargedreviews.com.

Archived backup Revision not recorded · 0.57 MB

Archived copy, unaltered, kept as a record of what EnerSys (ODYSSEY Battery) published. Original address: https://www.odysseybattery.com/wp-content/uploads/sites/2/odyssey-installation-operation-and-maintenance-manual.pdf. Copyright and takedown

Source first found
This copy captured
Archived
File detailsOriginal source
Pages
18
Embedded creation date
Aug 28, 2026
Embedded modification date
Aug 28, 2026

Embedded dates are file metadata, not independent proof of publication.

SHA-256: ef19101e83d774ad8cf232fa0944ab4630d6fa17b2559bfd59414fe76cfd6292

ODYSSEY Batteries General Product Limited Warranty, North America (AMER-EN-W-ODY-0626)

Archived copy of a document published by EnerSys (ODYSSEY Battery). Copyright retained by the publisher; kept for reference and verification only, no endorsement implied. To ask for its removal, email legal@chargedreviews.com.

Archived backup Revision not recorded · 0.14 MB

Archived copy, unaltered, kept as a record of what EnerSys (ODYSSEY Battery) published. Original address: https://www.odysseybattery.com/wp-content/uploads/sites/2/odyssey-battery-general-product-limited-warranty.pdf. Copyright and takedown

Source first found
This copy captured
Archived
File detailsOriginal source
Pages
2
Embedded creation date
Jun 9, 2026
Embedded modification date
Jun 9, 2026

Embedded dates are file metadata, not independent proof of publication.

SHA-256: 62a4e92be8886ac8514b5f1cf2a41972a6c47270f14782ca63222b3cd484c740

Submit a document

Warranty

Warranty term
4 years
Official warranty
Sources

Printed as "ODYSSEY Extreme Batteries (ODX PN Prefix): 4 years"; ODX-AGM8DKT carries the ODX prefix and does not end with M, so the one-year reduction for marine batteries does not apply. Free replacement for defects in material and workmanship, from the date of first purchase; the warranty excludes normal end of life.

Official warranty: ODYSSEY Batteries General Product Limited Warranty, North America (AMER-EN-W-ODY-0626) Rev AMER-EN-W-ODY-0626 · Checked · Earlier document

Location: Page 1, What is covered by the Warranty?

Documented

Sellers

No sellers found.

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Price history

No seller price history.

Owner reviews

No reviews yet

Own one? A verified review needs a receipt and a serial number photo, and counts 19× in the owner rating.

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Your reviews · Review policy

Evidence score

4/100Missing details20% documented

The Evidence score uses the priorities you choose. It counts published documents, such as certificates and warranty terms, and it compares a documented figure with the best documented figure of the same kind. It does not count owner reviews, and it is not a verdict on product quality or on how many people have reviewed it. A low score can mean little is documented, or that a documented figure is below the best of its kind. Undisclosed data scores 0.

Missing details. This number counts only the evidence recorded so far. The source review for this product is not finished, or the maker has not disclosed enough, so the number can only go up.

Missing for this product: Certificates evidence needed; Warranty energy disclosure evidence needed; Lifetime / capacity evidence needed; Cell model disclosure evidence needed.

12 V · Format not recorded · Rated capacity

The warranty term and the lifetime energy are each scored against the best documented value for a home storage battery: a value earns its share of that best, times the weight. A documented value always earns points; an undisclosed one earns 0.

Warranty term4 years4 / 20

4 years · 20% weight

4 of 20 years, the best documented for a home storage battery (printed by the maker): Bioenno Power 6V 3Ah LiFePO4 Battery (PVC, BLF-0603W)

Printed as "ODYSSEY Extreme Batteries (ODX PN Prefix): 4 years"; ODX-AGM8DKT carries the ODX prefix and does not end with M, so the one-year reduction for marine batteries does not apply. Free replacement for defects in material and workmanship, from the date of first purchase; the warranty excludes normal end of life.

20 / 100 × 20 = 4 points.

Official warranty: ODYSSEY Batteries General Product Limited Warranty, North America (AMER-EN-W-ODY-0626) Rev AMER-EN-W-ODY-0626 · Checked · Earlier document

Research pending, 0 points: Certificates, Warranty energy disclosure, Lifetime / capacity, Cell model disclosure.

Computed from public specifications and evidence records. Warranty duration is not service quality; certificate evidence points are not a safety rating. Compatibility and installation limits still apply.

How it works Manufacturer? Submit documentation

Certificates

No certificates on file. Certificate guide

Parts and accessories

No sourced accessories or replacement parts listed yet.

Model history

Model identity

Model
ODX-AGM8DKT
Published model / SKU
SMS-AGM8DK-S

ODYSSEY's earlier part number for the ODX-AGM8DKT, printed in brackets in the product page heading "ODYSSEY Extreme Battery ODX-AGM8DKT (SMS-AGM8DK-S)".

Official product page: ODYSSEY ODX-AGM8DKT product page, odysseybattery.com Checked · Earlier document

Manufacturer SKU ODX-AGM8DKT · US market

No historical observations recorded yet.

Community discussions

No discussions linked yet. Search DIY Solar Forum

Recalls / legal notices

No recalls or legal notices on file; this is not a complete recall or court search. All notices · Report a notice

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