Choosing a reliable Group 31 battery with high cold-cranking amps (CCA) is essential for reliable starts in extreme weather and demanding electrical loads. This guide analyzes five top options that deliver strong starting power, deep-cycle capability, and durable AGM construction. Each product is evaluated on performance, compatibility, and longevity to help you select the right battery for cars, trucks, boats, and RVs.
| Product | Brand | CCA | Reserve Capacity | Type |
|---|---|---|---|---|
| Goodyear 95R-H9-AGM | Goodyear | 950 | 190 RC | AGM Automotive |
| Mighty Max MM-G31 | Mighty Max Battery | 900 | 140 RC | AGM Car |
| Weize Platinum AGM BCI 35 | WEIZE | 650 | 36 Mo Warranty | AGM Automotive |
| Weize BCI Group 31M | WEIZE | 825 | Not Specified | Dual Purpose AGM |
| Interstate Batteries 31-AGM7 | Interstate Batteries | 925 | 2x-3x Life | Pure Lead AGM |
Goodyear 95R-H9-AGM Group 95R Battery
The Goodyear 95R-H9-AGM is a 12V, 100Ah AGM automotive battery designed for reliable starts in harsh weather. It delivers 950 CCA for cold mornings and extreme conditions, helping engines turn over quickly when temperatures drop. The battery is rated for a 190-minute reserve capacity, supporting longer accessory runs between charges. Its versatile installation options allow multiple mounting positions (excluding upside down), offering flexible placement for cars, trucks, or heavy-duty applications. Engineered for longevity, it aims to double the cycle life of conventional batteries, making it a solid choice for drivers who demand steady performance over time.
Mighty Max Battery MM-G31 Start and Stop Battery
The Mighty Max MM-G31 is a 12V, 100Ah AGM battery with 900 CCA, built for strong starts in all seasons. It emphasizes longevity with a 140-minute reserve capacity, supporting longer run times and an extended overall lifespan. The AGM design is sealed and spill-proof, providing neat installation and reliability in tight engine compartments. With high discharge output and deep-discharge recovery, this battery maintains power stability when it matters most, making it suitable for vehicles that demand reliable cranking plus steady auxiliary power.
Weize Platinum AGM Battery BCI Group 35
The WEIZE Platinum AGM Battery Group 35 is a 12V automotive battery with 650 CCA and a 36-month warranty. It features dimensions of 9.06″ L x 6.89″ W x 8.82″ H and a tapered terminal arrangement (Left negative, Right positive). While it offers a moderate RC and a solid lifespan, its true value comes from compatibility with vehicles that require AGM technology and a compact footprint. This battery emphasizes compatibility guidance to ensure proper fitment and reliable performance in mid-size cars and some light trucks. The design supports extended life by leveraging AGM construction and heat resistance features suitable for varied climates.
Weize BCI Group 31M Dual Purpose AGM Battery
The WEIZE BCI Group 31M provides a dual-purpose deep-cycle and starting power solution for marine and RV use. It features dual terminals (Left positive, Right negative) and a low internal resistance for reliable power delivery. With high output and 2x more cycle life than traditional flooded marine batteries, this model is designed to endure the rigors of boating and trailer life. Quick charging capabilities are highlighted, with a recommendation to use a controlled charging regime (14.4V +/- 0.1V, up to 21A) to achieve optimal recharge efficiency. It aims to deliver steady power for engines, trolling motors, and onboard electronics.
Interstate Batteries Heavy Duty Marine Deep Cycle 31-AGM7
The Interstate Batteries 31-AGM7 is a heavy-duty marine AGM battery designed for commercial and extreme cycling applications. It delivers 400 deep cycles, supporting demanding environments such as refrigeration units, APUs, and large vessels. This group size 31 AGM battery offers long cycle life, robust performance in extreme temperatures, and a 2x to 3x improvement in life compared to conventional flooded options. Its 2-in-1 capability supports high cranking power while delivering deep-cycle reliability for extended boating or RV use, making it a strong candidate for commercial or serious recreational setups.
UPLUS BCI Group 31M Dual Purpose Marine Battery
The UPLUS 31M Dual Purpose Marine Battery combines a 12V, 105Ah capacity with 825CCA in a dual-purpose design suitable for starting engines up to 350HP. It emphasizes space-saving by combining starter and deep-cycle functions in one unit, and it highlights enhanced vibration resistance for marine environments. The battery is built to withstand the rough motion of water travel and trailer transport, ensuring consistent startup power and reliable power delivery for navigation devices, lighting, and engine systems.
Buying Guide: Key Considerations For Group 31, 950 CCA, AGM Batteries
Battery needs vary by vehicle type, climate, and electrical load. When shopping for a Group 31, 950 CCA battery, consider the following:
- CCA vs RC: CCA measures cold-start power; RC (reserve capacity) indicates how long the battery can run essential systems if the alternator isn’t charging. A higher CCA is essential for cold climates, while RC matters for equipment-heavy applications.
- AGM vs Flooded: AGM (Absorbent Glass Mat) offers better vibration resistance, spill-proof design, and deeper cycling—ideal for marine, RV, and performance vehicles. Flooded batteries are cheaper but less durable in rough conditions.
- Size and Terminal Configuration: Confirm battery dimensions and terminal arrangement to ensure a proper fit and easy connections in your engine bay or compartment. Some models use left-negative/right-positive terminals; others have standard layouts.
- Warranty And Lifespan: Look for batteries with multi-year warranties and documented cycle life. AGM models often provide longer lifecycles in demanding environments.
- Vehicle and Use Case: Marine, RV, and dual-purpose batteries require high cycle life and robust construction. Cars and trucks with heavy electrical loads benefit from high CCA and strong reserve capacity.
- Charging Compatibility: Ensure your charger and alternator support AGM charging voltages (typically around 14.4–15.0V). Some models specify maximum charging current to avoid damage.
- Installation Orientation: Some AGM batteries allow multiple mounting positions, but avoid mounting them upside down unless specified by the manufacturer.
In selecting a battery, cross-check your owner’s manual for the recommended Group Size, CCA, and RC ratings. Consider the climate in which you operate and whether you need dual-purpose capability for starting and deep cycling. The products reviewed here offer a range of CCA values, reserve capacities, and compatibility with boats, RVs, and everyday vehicles, enabling you to balance power, longevity, and cost.