When your vehicle needs a new battery, the myriad of model numbers and group sizes can be confusing. If you’ve come across the BN58 battery model name, you’re likely looking for a reliable power source for your car. This comprehensive guide will explain everything you need to know about the BN58 battery, its specifications, and why it might be the perfect fit for your vehicle.
What is a BN58 Battery? Understanding the BCI Group 58 Standard
The “BN58” model name typically refers to a battery that conforms to the BCI Group 58 standard. BCI stands for the Battery Council International, which standardizes battery sizes and specifications to ensure compatibility across vehicles and manufacturers .
A BCI Group 58 battery is a 12-volt automotive battery known for its compact dimensions, making it ideal for modern vehicles with limited engine bay space, particularly compact cars and hybrids . Its primary function is to reliably start the engine and power the electrical systems, including advanced features like start-stop technology, which can reduce fuel consumption by 5-8% .
Key Specifications of a BCI Group 58 (BN58) Battery
The table below summarizes the core physical and electrical specifications you can expect from a standard BN58 battery .
| Specification | Typical Value |
|---|---|
| Voltage | 12V |
| Length | 9.06 – 12.4 inches |
| Width | 6.88 – 6.9 inches |
| Height | 7.5 inches |
| Cold Cranking Amps (CCA) | 550 – 850 A |
| Reserve Capacity (RC) | 80 – 100 minutes |
Note: Slight variations in dimensions can occur between brands. Always double-check your vehicle’s manual for exact requirements .
Where is the BN58 Battery Used? Vehicle Compatibility
The BN58 (Group 58) battery is commonly found in a range of modern vehicles. Its space-efficient design and sufficient power output make it a popular choice for several car manufacturers.
You will often find this battery size in models such as :
- Honda Civic (2016-2023 models)
- Toyota Corolla (2018-2023 models)
- Ford Fusion Hybrid
- Chrysler 300, Dodge Charger, and Jeep Grand Cherokee
BN58 vs. Other Technologies: AGM vs. Flooded Lead-Acid
When selecting a BN58 battery, one of the most critical decisions is choosing between AGM (Absorbent Glass Mat) and traditional flooded (or wet) lead-acid designs. This choice significantly impacts performance, maintenance, and lifespan.
The following table compares these two technologies for a BN58 form factor .
| Feature | AGM BN58 Battery | Flooded BN58 Battery |
|---|---|---|
| Technology | Electrolyte is suspended in a fiberglass mat | Liquid electrolyte freely surrounds the plates |
| Lifespan | 7 – 10 years | 3 – 5 years |
| Maintenance | Maintenance-free | Requires quarterly checks of electrolyte levels |
| Vibration Resistance | Excellent | Moderate |
| Spill-Proof | Yes, can be mounted in various orientations | No, must be kept upright |
| Charge Acceptance | Faster (up to 40% quicker charging) | Standard |
| Cost | Higher ($180 – $250) | Lower ($90 – $120) |
Why choose AGM? An AGM BN58 battery is an excellent upgrade, especially for vehicles with start-stop systems or numerous electronic accessories. Its longer life, superior durability, and maintenance-free operation justify the higher initial cost for many drivers .
Why choose Flooded? A flooded BN58 battery is a cost-effective option for budget-conscious consumers with standard electrical demands and who don’t mind performing periodic maintenance .
Why is Correct Battery Cross-Reference Important?
“Cross-referencing” means finding a battery from a different brand that is a direct replacement for your original BN58 model. This is crucial because an incorrect battery can lead to serious issues :
- Physical Damage: A battery that’s too large may not fit the tray, leading to vibration damage. A small battery might not be secured properly.
- Electrical Issues: A battery with insufficient CCA may fail to start your engine in cold weather. The wrong terminal layout can cause short circuits and damage sensitive electronics.
- Reduced Lifespan: Using a flooded battery in a system designed for AGM (or vice-versa) can lead to undercharging or overcharging, significantly shortening the battery’s life .
Always use a cross-reference chart from a reputable retailer or manufacturer to find a perfect match that meets or exceeds your vehicle’s original specifications .
Maintenance Tips to Extend Your BN58 Battery’s Life
To get the maximum lifespan from your battery, follow these simple practices :
- Regular Cleaning: Clean the terminals every three months with a wire brush and a paste of baking soda and water to prevent corrosion. Apply dielectric grease afterward.
- Voltage Checks: Use a multimeter to check the voltage monthly. A fully charged battery should read 12.6V or higher when the engine is off.
- Avoid Deep Discharges: Try not to let the battery’s charge fall below 50% capacity. For infrequently driven vehicles, use a maintenance charger like a Battery Tender.
- Cold Weather Care: Park in a garage during winter to reduce the stress of cold starts.
Top BN58 Battery Recommendations
Based on performance and reliability, here are some highly-regarded BCI Group 58 batteries :
- Optima YellowTop D58L (AGM): Excellent for high-demand electrical systems and vehicles with start-stop technology (800 CCA).
- Odyssey 58-PC1500 (AGM): Known for extreme durability and high power (850 CCA).
- ACDelco 58AGM (AGM): A reliable OEM-style replacement with strong performance (760 CCA).
- Interstate MT-58 (Flooded): A solid value option for standard applications (750 CCA).
Conclusion
Choosing the right BN58 battery is about understanding the BCI Group 58 standard and matching it to your vehicle’s requirements and your driving needs. By prioritizing specifications like CCA and choosing between AGM and flooded technology wisely, you can ensure reliable starts and optimal performance for years to come. Remember to perform regular maintenance and always cross-reference carefully when switching brands.