Group 35 batteries are lead-acid or AGM batteries with standardized dimensions (12.3 x 6.8 x 9.4 inches) and 44-65 Ah capacity. Commonly used in cars, trucks, marine equipment, and solar systems, they provide reliable starting power and deep-cycle performance. Their compatibility with modern vehicles and renewable energy setups makes them a versatile choice.
What Is a Group Size 24 Battery?
What Are the Standard Dimensions of a Group 35 Battery?
Group 35 batteries measure 12.3 x 6.8 x 9.4 inches (LxWxH) and weigh 30-45 lbs. These dimensions ensure compatibility with battery trays in vehicles like Honda Civics, Subaru Outbacks, and marine applications. The standardized size simplifies replacements, though users should verify terminal placement (top-post or side-post) to match their system’s requirements.
The standardized footprint of Group 35 batteries allows for easy upgrades across multiple platforms. For example, many compact SUVs and hybrid vehicles prioritize this size due to limited engine compartment space. When installing, always check the battery hold-down clamp – some vehicles require J-hook adapters for secure mounting. Marine applications often use Group 35 batteries in trolling motor configurations, where the 9.4-inch height fits standard battery boxes. Weight distribution is another consideration; lighter AGM versions (33-38 lbs) help improve fuel efficiency in passenger vehicles by 1-2% compared to traditional flooded batteries.
Top 5 best-selling Group 14 batteries under $100
| Product Name | Short Description | Amazon URL |
|---|---|---|
|
Weize YTX14 BS ATV Battery  |
Maintenance-free sealed AGM battery, compatible with various motorcycles and powersports vehicles. | View on Amazon |
|
UPLUS ATV Battery YTX14AH-BS  |
Sealed AGM battery designed for ATVs, UTVs, and motorcycles, offering reliable performance. | View on Amazon |
|
Weize YTX20L-BS High Performance  |
High-performance sealed AGM battery suitable for motorcycles and snowmobiles. | View on Amazon |
|
Mighty Max Battery ML-U1-CCAHR  |
Rechargeable SLA AGM battery with 320 CCA, ideal for various powersport applications. | View on Amazon |
|
Battanux 12N9-BS Motorcycle Battery  |
Sealed SLA/AGM battery for ATVs and motorcycles, maintenance-free with advanced technology. | View on Amazon |
How Do Group 35 Batteries Compare to Group 34 or 24F?
Group 35 batteries are shorter than Group 34 (10.9” height) but offer similar cold-cranking amps (550-650 CCA). Compared to Group 24F (14.5” length), Group 35 fits compact spaces better. While Group 24F has higher reserve capacity, Group 35 excels in fuel-efficient vehicles requiring lightweight, vibration-resistant power sources.
| Type | CCA Range | Weight | Typical Applications |
|---|---|---|---|
| Group 35 | 550-650 | 30-45 lbs | Compact cars, marine |
| Group 34 | 600-750 | 45-55 lbs | Trucks, SUVs |
| Group 24F | 700-850 | 50-60 lbs | Full-size sedans, RVs |
What Are the Key Features of AGM Group 35 Batteries?
AGM (Absorbent Glass Mat) Group 35 batteries are spill-proof, maintenance-free, and handle deep discharges. Features include 700+ CCA, 100-120-minute reserve capacity, and 500+ cycle life. They outperform flooded batteries in extreme temperatures (-40°F to 176°F) and reduce sulfation, making them ideal for infrequently used vehicles.
The fiberglass mat technology in AGM batteries provides three key advantages over traditional designs. First, the electrolyte suspension system allows for 2x faster recharge rates compared to flooded batteries. Second, the sealed construction prevents acid stratification – a common issue in marine deep-cycle applications. Third, AGM batteries maintain stable voltage output even when discharged to 50%, making them suitable for modern vehicles with advanced electronics. Many premium AGM models now include carbon-enhanced plates that boost charge acceptance by 40%, particularly beneficial for start-stop systems that experience frequent engine restarts.
How Does Temperature Affect Group 35 Battery Performance?
Cold reduces CCA by 30-40% at 0°F, while heat above 100°F accelerates water loss. AGM batteries mitigate these issues with pressurized VRLA design. For winter, a battery blanket maintains optimal charge. In heat, periodic voltage checks (12.6V resting) prevent over-discharge.
Electrochemical reactions slow dramatically in freezing conditions – at -22°F, a Group 35 battery delivers only 35% of its rated CCA. This is why Arctic-grade versions feature thicker plates and higher sulfuric acid concentrations. Conversely, high temperatures increase self-discharge rates by up to 60% in flooded batteries. AGM technology reduces this thermal degradation through recombinant gas technology, which captures and recycles hydrogen emissions. For users in extreme climates, consider these solutions:
- Insulated battery wraps for sub-zero environments
- Ventilated battery boxes in engine compartments exceeding 140°F
- Thermal management systems for hybrid/electric vehicle conversions
FAQs
- How long do Group 35 batteries last?
- Flooded: 3-5 years. AGM: 4-7 years. Lithium: 10+ years. Lifespan depends on discharge depth—avoid draining below 50% for lead-acid, 20% for lithium.
- Can I use a Group 35 battery in a Group 34 slot?
- Yes, with a spacer. Group 35 is 1.5” shorter but shares width/length. Ensure terminals align and cables reach.
- What’s the best charger for AGM Group 35?
- Multi-stage chargers with AGM mode (14.7V absorption, 13.6V float). NOCO Genius5 and CTEK MXS 5.0 are top picks.