Interstate Batteries MTX-49/H8 AGM Automotive Battery
Priced as of May 28, 2026
4.5(385 ratings)Buy on AmazonSaved to your guest loadout. Sign up to also save to your Cabinet (consumables) or Kit (tools you own).
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CarCareTruth's Analysis
Last reviewed May 28, 2026
TL;DR Sealed premium AGM, Group 49/H8, 900 SAE CCA, 3-year full replacement warranty. Fits European-platform vehicles and non-PowerBoost F-150 14th gen; post-warranty service-life data not yet available.
What it is and how it performs
The MTX-49/H8 is a sealed AGM in BCI Group 49/H8 (L5) with 900 SAE CCA published cleanly as the primary cranking figure. Covers European-platform vehicles (BMW, Mercedes, Audi, Volvo) and North American trucks with H8 tray space. Warranty is 3 years full replacement. Early performance is strong at 4.5 stars across 385 reviews; community service-life evidence past the warranty period is not yet available.
Who should buy this — and who should skip it
Right for non-PowerBoost F-150 14th gen owners (2021-2026 EcoBoost, V8, diesel) wanting an H8 capacity upgrade, and for European-platform owners needing 900 CCA Group 49/H8 AGM. Skip if you have the PowerBoost hybrid — the H8 physically won't fit.
Safety and environmental impact
Sealed AGM construction — no chemical exposure pathway in normal installation; the Prop 65 lead warning is a labeling fact on the lead hardware. Spent lead-acid batteries return through the retail core-charge system; a typical $15-$25 core charge is refunded on return.
Frequently asked questions
Does the Interstate MTX-49/H8 fit the Ford F-150 14th gen?▾
It fits non-PowerBoost F-150 14th gen trims (2021-2026 EcoBoost, V8, diesel) as a capacity upgrade over the OEM Group 65. It does NOT fit the PowerBoost hybrid — the 48V mild-hybrid module physically occupies the H8 space in the PowerBoost engine bay. PowerBoost owners need an H7 battery instead.
What vehicles does the Group 49/H8 fit?▾
Group 49/H8 (also called L5 in European nomenclature) is the standard battery size for many European-platform vehicles: BMW 7 Series, Mercedes-Benz E-Class and S-Class, Audi A6/A7/A8/Q7, Volvo XC90, and others. It also fits various Ford trucks/SUVs and GM full-size trucks with H8 tray space. Always verify against your owner's manual using your specific year and engine.
Is 900 CCA an SAE J537 figure or a marketing figure?▾
The 900 CCA figure in the product title is the SAE J537 cold-cranking amp rating — confirmed as the primary cranking-amp figure on the listing, with no PCA or other non-SAE marketing figure substituted. SAE CCA is the standard used by vehicle manufacturers for minimum specifications.
What is the warranty on the MTX-49/H8?▾
The Amazon spec table confirms a 3-year performance warranty. The prorated extension period has not been confirmed from available sources. Note: community reports indicate warranty claims for Amazon-channel purchases may require authorization from an Interstate Battery dealer; the in-store purchase warranty process may differ.
Is the MTX-49/H8 an add-on item on Amazon?▾
Yes — confirmed from the Amazon listing. It requires a minimum qualifying order or Subscribe & Save to purchase standalone. Factor this into order planning, or purchase in-store at an Interstate Battery dealer, AutoZone, O'Reilly, or NAPA.
Why does this battery carry a Prop 65 warning?▾
California Proposition 65 requires a warning when a product contains lead or other listed substances. All lead-acid automotive batteries carry this warning — it attaches to the lead hardware in the battery construction, not to a chemical exposure from normal installation use.
From the manufacturer
Marketing copy from Interstate Batteries, via Amazon. Not editorial.
- •AUTOMOTIVE PURE LEAD AGM: Download the Compatibility Guide below under Product Guides & Documents to learn more and verify fit. Interstate's MTX AGM design packs more lead into the battery, giving you the longest life possible for your start-stop vehicle
- •PREMIUM BATTERY PERFORMANCE: Interstate’s MTX absorbed glass-mat (AGM) battery will meet or exceed your car’s starting requirements while delivering premium battery performance to power all your accessories and plug-ins, making it Outrageously Dependable
- •2X-3X MORE BATTERY LIFE: Expected service life is 2X more than a conventional lead alloy AGM battery, and 3X longer life than conventional flooded battery. This design packs more lead into the car battery, giving you the longest life possible while the battery itself is spill-proof and vibration resistant
- •MAINTENANCE-FREE AND SPILL-PROOF: Rechargeable, maintenance-free, and spill-proof because of the AGM and VRLA (valve regulated) technology that eliminates spills and overpressure. The MTX is an absorbed glass-mat battery using a revolutionary design that suspends electrolyte in fiberglass mats instead of letting free-flowing liquid in a battery cell
- •MOST TRUSTWORTHY POWER SOURCE: For 70+ years, Interstate Batteries purpose has been to deliver the most trustworthy source of power to the world - every day, and have become the preferred battery among automotive stores and professionals
Confirmed fitment
Per manufacturer cross-reference. Verify on Amazon before purchase.
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Manufacturer videos
Manufacturer images
Manufacturer specifications
- Brand
- Interstate Batteries
- Vehicle Service Type
- Passenger Car, SUV, Truck
- Size
- Group Size 49
- Voltage
- 12 Volts
- Battery Cell Composition
- Lead-Acid, AGM
- Item Weight
- 59 Pounds
- Product Dimensions
- 6.94"D x 13.94"W x 7.5"H
- Terminal
- Top Post
- Automotive Fit Type
- Vehicle Specific Fit
- Manufacturer
- Interstate Batteries
- Compatible with Vehicle Type
- Passenger Car, SUV, Truck
- Item Dimensions D x W x H
- 6.94"D x 13.94"W x 7.5"H
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Top Amazon review
↗External — Amazon's most-helpful review for context.
Perfect replacement for factory Jaguar F Type R !
This was a direct replacement for my OEM battery in my 2016 Jaguar F Type R. My original factory battery (also an Interstate) was WELL overdue for replacement, and this was an easy swap. Note: just don’t forget to remove the plastic post cover first (D’oh). Highly tecommended.