Answer: Group 24 and Group 35 batteries differ in physical dimensions, capacity, and applications. Group 24 batteries are larger (10.25″ x 6.8″ x 8.9″) with higher reserve capacity (120-140 minutes), ideal for RVs and marine use. Group 35 batteries are smaller (9.06″ x 6.88″ x 8.43″) and lighter, optimized for automotive starting with 60-80 Ah capacity. Compatibility depends on space and power requirements.
What Is a Group Size 24 Battery?
How Do Group 24 and Group 35 Batteries Compare in Size and Weight?
Group 24 batteries measure approximately 10.25″ (L) x 6.8″ (W) x 8.9″ (H) and weigh 40-50 lbs. Group 35 batteries are more compact at 9.06″ x 6.88″ x 8.43″ and weigh 30-40 lbs. The reduced size of Group 35 makes them preferable for modern vehicles with tighter engine compartments, while Group 24 suits applications prioritizing higher energy storage.
What Are the Capacity Differences Between Group 24 and Group 35?
Group 24 batteries typically offer 70-85 Ah (ampere-hours) and 120-140 minutes of reserve capacity. Group 35 provides 60-80 Ah with 90-110 minutes reserve. For deep-cycle applications like RVs, Group 24’s higher cyclic stability outperforms Group 35, which prioritizes cold cranking amps (CCA) for engine starting (650-750 CCA vs. Group 24’s 500-600 CCA).
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 |
| Specification | Group 24 | Group 35 |
|---|---|---|
| Typical Ah | 70-85 | 60-80 |
| Reserve Capacity | 120-140 min | 90-110 min |
| CCA Range | 500-600 | 650-750 |
Which Vehicles Use Group 24 vs. Group 35 Batteries?
Group 24 powers RVs, boats, and solar setups requiring sustained energy output. Group 35 is common in cars like Honda Accords, Subarus, and light trucks needing reliable cold starts. Marine Group 24 variants include dual-terminal designs for trolling motors, while Group 35 often features AGM technology for vibration resistance in performance vehicles.
Commercial trucks and off-grid power systems frequently rely on Group 24 batteries due to their ability to handle prolonged discharge cycles. Group 35 batteries have become standard in hybrid vehicles where space efficiency matters, with models like the Toyota Prius using modified Group 35 configurations. Recent advancements in battery tray designs allow some crossover SUVs to accommodate both groups, though manufacturers strongly recommend adhering to specified sizes for optimal electrical system performance.
How Does Lifespan Differ Between Group 24 and Group 35 Batteries?
Group 24 lasts 4-6 years in deep-cycle use due to thicker plates. Group 35 averages 3-5 years but excels in high-CCA, short-burst scenarios. Maintenance impacts longevity: flooded Group 24s need periodic watering, while sealed Group 35 AGM batteries require less upkeep but cost 20-30% more upfront.
The lifespan gap widens in extreme conditions. Group 24 batteries operating in marine environments with regular 50% depth-of-discharge cycles typically outlast automotive batteries by 18-24 months. However, Group 35’s vibration-resistant construction gives it an edge in vehicles subjected to rough terrain. Proper charging practices extend both types’ lives—using a smart charger that prevents sulfation can add 1-2 years to either battery group.
What Are the Cost Differences Between These Battery Groups?
Group 24 ranges from $150-$300, depending on technology (flooded, AGM, gel). Group 35 costs $100-$250, with premium AGM versions at the higher end. While Group 35 is cheaper initially, Group 24’s extended lifespan in compatible applications may offer better long-term value.
“While Group 35 dominates automotive markets, Group 24 remains irreplaceable for deep-cycle needs. Advances in lithium-ion are challenging both, but lead-acid’s cost-effectiveness keeps them relevant. Always match the battery group to the manufacturer’s specs—wrong sizes risk warranty voids and performance issues.” – Industry Expert, Power Storage Solutions
FAQ
- Q: Can I use a Group 24 battery in a car designed for Group 35?
- A: Only if physical space and terminal alignment permit. Verify CCA requirements—insufficient power may strain the starter.
- Q: Which battery charges faster?
- A: Group 35 AGM batteries accept charge 15-20% faster than flooded Group 24 variants, reducing alternator load.
- Q: Are lithium-ion versions available for these groups?
- A: Yes, but they cost 2-3x more. Lithium excels in weight savings and lifespan but requires compatible charging systems.