In most cases, you should not substitute a Group 24 battery for a Group 35. Group sizes are chosen for fit, mounting, and electrical requirements, and using the wrong size can lead to fit issues or insufficient starting power. Always verify the vehicle manufacturer’s recommended group size and compare physical dimensions, terminal layout, and performance specs before replacing a battery.
Understanding group sizes and why they matter
Group sizes identify more than just label names. They define the battery’s dimensions, terminal arrangement, vent locations, and mounting compatibility. A Group 24 and a Group 35 differ in these physical and connector aspects, which can affect whether the battery sits securely, reaches the cables, or clears the hood and other components. Even if a battery appears to fit, a mismatch in electrical specs can compromise starting performance and charging behavior.
What distinguishes Group 24 from Group 35
Group 24 and Group 35 are designed for different trays, clamps, and terminal configurations. A replacement that does not align with the original tray width, height, or hold-down points may shift, rattle, or fail to secure properly. Terminal positions and post types may also differ, making cable routing and connection awkward or unsafe. Always confirm the exact dimensions and post arrangement for your vehicle.
Can a Group 24 be used instead of a Group 35?
Only if the battery physically fits the tray and hold-down, and it meets or exceeds the vehicle’s required cold-cranking amps (CCA) and reserve capacity (RC). If any of these conditions is not met, do not substitute. Using an undersized or poorly fitting battery can lead to starting problems, electrical issues, or damage to the charging system.
To determine eligibility, consider these checks before making a substitution:
- Physical fit: length, width, and height must align with the battery tray and clearance around the engine bay.
- Hold-down and tray compatibility: mounting hardware should align and secure the battery without modification.
- Terminal type and orientation: posts or connectors must match your cable routing and polarity.
- Electrical specs: the replacement must meet or exceed the vehicle’s required CCA and RC to ensure reliable starting and consistent charging.
- Vent and orientation: the vent location should not conflict with surrounding components or openings.
Concluding: If any of these checks fail, do not substitute. Choose the correct Group size as specified by the manufacturer, or consult a professional mechanic for guidance.
If you determine a substitution is acceptable, coordinate with a retailer or mechanic to verify the exact CCA/RC ratings and confirm warranty terms before installation.
Summary
Battery group size is about fit and performance. A Group 24 is not automatically interchangeable with Group 35. Always consult the vehicle’s owner manual, verify dimensions and terminal layout, and ensure the electrical specs meet or exceed the original requirements. When in doubt, seek professional assistance to avoid starting issues or damage to the charging system.
Are group 24 and 35 batteries the same?
They are basically the same size except for length. Our Group-35 can be used in place of a Group-24; it is only 1-inch shorter left to right dimensions.
Are group 24 and 34 batteries the same?
The reserve capacity rating on the Group 34 BLUETOP is 120 minutes, while the Group 24 reserve capacity rating is 140 minutes. The OPTIMA Group 34 battery is an AGM (absorbed glass mat) lead-acid battery, while the Group 24 is a flooded lead-acid battery.
Is 24F the same as 35?
The 24F battery is larger, heavier, and offers higher Cold Cranking Amps (CCA) and reserve capacity, ideal for bigger vehicles with higher power demands. The 35 battery is smaller and lighter, suitable for compact cars with moderate starting needs.
What is a group 24 battery used for?
A Group 24 battery is a specific size of battery you'd see in vehicles, backup power systems, and medical systems. Group 24 batteries generally function as deep cycle batteries rather than starting applications where they start an engine. A standard model measures 10.5” L x 6.1875” W by 8.875” high.