Group 24 batteries stand out as a specialized variant of lead-acid car batteries crafted for the unique demands of large trucks, RVs, farm equipment, and other heavy-duty vehicles. Their designation as a “group size” signifies adherence to standardized dimensions established by the Battery Council International. This guide endeavors to deliver a thorough grasp of group 24 batteries, delving into their distinctive features and elucidating the reasons behind their popularity as a preferred power source for substantial vehicles.
What is Group Size?
The battery group size is a standardized specification, defined by the Battery Council International (BCI), determining the physical dimensions of lead-acid automotive starter batteries. These batteries come in various commonly used group size designations, each tailored to specific applications. For example:
- Group 24: A large battery often found in heavy-duty vehicles like trucks, with dimensions around 10″ x 7″ x 9″.
- Group 27: An even larger battery suitable for commercial vehicles and trucks, approximately 12″ x 7″ x 9″ in size.
- Group 35: A mid-sized battery commonly used in many passenger cars, with dimensions of about 10″ x 7″ x 7″.
- Group 51R: A small battery designed for compact cars and some motorcycles, typically measuring 5″ x 5″ x 4″.
- Group 65: A large battery suitable for performance cars, trucks, or diesel vehicles, with dimensions around 12″ x 6″ x 9″.
These standardized group sizes ensure compatibility with trays, clamps, and other accessories, making it easier to replace batteries across different manufacturers as long as they share the same group size designation. When replacing a battery, identifying the correct group size is crucial for ensuring a proper fit and electrical connections. This information is usually available on the battery’s label, and consulting the vehicle owner’s manual can also confirm the appropriate group size for a specific make and model.
Everything You Should Know About Group 24 Batteries
Specs and Technical Details
Traditional group 24 lead-acid batteries typically boast the following specifications:
- Voltage: 12V
- Capacity: 50-100 Ah
- Dimensions: 10″ x 6 7/8″ x 8 15/16″
- Terminal type: SAE / GM posts
- Average weight: 50-60 lbs
These batteries, known for high Cold Cranking Amps (CCA), provide ample power to start diesel engines and sufficient capacity to run various accessories. However, the emergence of lithium batteries, exemplified by the LiTime 12V Group 24 LiFePO4 lithium battery, is altering the landscape:
- Voltage: 12V
- Capacity: 100 Ah (common for lithium group 24)
- Dimensions: Identical to group 24
- Terminals: Compatible with lead-acid
- Average weight: Only 21 lbs
While lead-acid group 24 batteries are reliable, lithium variants are gaining favor due to their superior power-to-weight ratio and long-term cost efficiency.
Applications and Vehicle Compatibility
Group 24 batteries are prevalent in various applications, including:
- Heavy-duty trucks (e.g., semi-trucks and dump trucks)
- RV motorhomes
- Buses
- Commercial work vans
- Agricultural equipment
- Diesel pickup trucks
Advantages of Group 24 Batteries
Group 24 batteries offer several advantages:
- Higher capacity for longer run times
- Efficient power output for engine starting
- Compact and easy to install
- Durability in tough environments and extreme temperatures
- Many are maintenance-free and easily replaceable or upgradable.
How to Maintain Group 24 Battery
Proper maintenance ensures the longevity and optimal performance of a Group 24 battery:
- Keep it Clean: Regularly inspect terminals and cables for corrosion. Clean using a mixture of baking soda and water with a wire brush. Rinse and dry thoroughly.
- Check Electrolyte Level: For batteries with removable caps, monitor electrolyte levels and add distilled water if needed.
- Avoid Deep Discharges: Maintain the battery above 50% charge to extend its lifespan. Consider using a maintainer or charger for frequent discharges.
- Charge Properly: Use a compatible charger matching voltage and charging requirements. Avoid overcharging.
- Store Appropriately: Store in a cool, dry place for prolonged periods, as extreme temperatures can impact performance.
- Perform Regular Inspections: Check for physical damage, leaks, or wear. Replace the battery if issues arise.
Remember to consult the manual or manufacturer for specific maintenance instructions tailored to your battery type.
