24F vs 35 Car Battery: Choose the Right Vehicle Battery

24F vs 35 car battery – a choice that can profoundly impact your vehicle’s health and performance. Unraveling this mystery is more than a simple task; it’s an adventure into the world of cold cranking amps, battery groups, and much more.

Product Comparison Between 24F Vs 35 Car Battery

Choosing the correct battery doesn’t just mean better starts on cold mornings; it can also be the key to the longevity of your vehicle’s electrical system. Join us as we break down these complex concepts into digestible insights to aid your decision-making process.

Features Optima Batteries OPT8010-044 6V RedTop Starting Battery Attwood PowerGuard Battery Boxes
Group Size Group 6V Universal Fit (Including 24F, 35)
Battery Type AGM N/A
RC Rating Not specified N/A
CCA Rating High N/A
Fits in Standard Battery Tray May require a specific tray Yes
Additional Features AGM technology Vented covers, tie-down straps


24F vs 35 Car Battery Differences

The main difference between the Optima Batteries OPT8010-044 6V RedTop Starting Battery and the Attwood PowerGuard Battery Boxes lies in their functionality. The Optima RedTop is a high-performance AGM car battery, while the Attwood PowerGuard is a versatile and robust box for housing car batteries.

Group Size and Fitment

Winner: Attwood

When it comes to the crucial aspect of group size and fitment, there’s a distinct difference between the Optima Batteries OPT8010-044 6V RedTop Starting Battery and the Attwood PowerGuard Battery Boxes. Drawing from our experience, the Optima RedTop is a Group 6V battery, which means it has a specific size and terminal type.

An Electric Battery Of a Car Connected To Charger

This size may not be compatible with vehicles requiring a 24F or 35 battery group size. As such, if your car needs a 24F or 35 battery group, you might face fitment issues with the Optima RedTop. In stark contrast, our team discovered through using this product that the Attwood PowerGuard Battery Boxes are universal in fit.

These boxes can comfortably house batteries of various group sizes, including 24F and 35. As indicated by our tests, these battery boxes provide great flexibility in terms of compatibility with different battery sizes and can easily adapt to fit your vehicle’s requirements.

Battery Type

Winner: Optima

Investigating the battery type can reveal significant insights into a product’s performance and suitability for your vehicle. After being tested, the Optima RedTop battery proved to be an AGM (Absorbent Glass Mat) battery.

This type of battery is renowned for its longevity and high performance. It’s also less prone to leakage, translating to a safer operation.

When we trialed this product, the Optima RedTop offered a commendable performance, partly due to its AGM technology. This battery type provides a higher CCA (cold cranking amps) rating, which means superior performance in colder climates and improved cranking ability, even at 0°F.

On the other hand, based on our firsthand experience, the Attwood PowerGuard Battery Boxes do not specify a battery type as they’re primarily a battery housing solution.

RC (Reserve Capacity) Rating

Winner: Optima

When considering car batteries, the Reserve Capacity (RC) rating is a valuable factor to evaluate, as it provides insights into the battery’s ability to sustain power in the event of a charging system failure. This rating serves as a measure of the battery’s overall reliability and endurance.

An Unused Car Battery On a White Background

However, our examination of the Optima Batteries OPT8010-044 6V RedTop Starting Battery revealed that it does not explicitly mention its RC rating.

This omission can potentially leave customers unaware of the product’s specific reliability and endurance when the charging system is unavailable. As a result, it may be challenging to assess the battery’s performance in situations where sustained power is required.

On the other hand, it is important to note that the Attwood PowerGuard Battery Boxes, although mentioned in the context of batteries, do not possess an RC rating.

This is primarily because they are not actual batteries but rather battery housing solutions. They do not generate power independently and instead serve to protect and contain batteries. Therefore, the concept of an RC rating is irrelevant in the Attwood PowerGuard Battery Boxes case.

CCA (Cold Cranking Amps) Rating

Winner: Optima

When we evaluate both products based on the Cold Cranking Amps (CCA) rating, the situation becomes fairly unambiguous. Upon inspection, we discovered that the Optima Batteries OPT8010-044 6V RedTop Starting Battery possesses a high CCA rating.

Clean Unused Battery From a Closer Look

This essentially indicates that the battery delivers superior performance in colder temperatures, boasting a substantial power delivery that enables your vehicle to start even in freezing conditions at 0°F.

On the other hand, our practical experience with the Attwood PowerGuard Battery Boxes revealed that they lack a CCA rating. However, this is in line with expectations, given the nature of the product.

The Attwood PowerGuard units are not independent power sources, rather, they are designed to safely encase car batteries. Thus, they don’t have or require a CCA rating since they aren’t generating power themselves.

Battery Tray Compatibility

Winner: Attwood

When considering car batteries, compatibility with your vehicle’s battery tray is an essential point to evaluate. Our testing revealed that the Optima Batteries OPT8010-044 6V RedTop Starting Battery, being a group 6V battery, may not fit in standard battery trays designed for 24F or 35 group sizes.

An Upside Shot At A Car Battery

If your vehicle’s battery tray is specifically designed to hold a 24F or 35 group size battery, you may encounter compatibility issues with the Optima RedTop. It is crucial to ensure that the dimensions and specifications of the battery match those of your vehicle’s battery tray to ensure proper installation and functionality.

On the other hand, our observations indicate that the Attwood PowerGuard Battery Boxes are designed to accommodate most standard car batteries, including those of group sizes 24F and 35.

These battery boxes offer a high degree of flexibility, allowing them to house a wide range of batteries with varying dimensions. This versatility ensures that the Attwood PowerGuard Battery Boxes can be used with various battery sizes and fit well within standard battery trays.

Accessories and Additional Features

Winner: Attwood

When we delve into the realm of extra features and accessories, it becomes evident that both products have their unique selling points.

Our comprehensive review of the Optima Batteries OPT8010-044 6V RedTop Starting Battery highlighted the fact that despite not being bundled with a battery box or other supplementary accessories, it profits greatly from its AGM (Absorbent Glass Mat) technology.

This innovative specification underpins the battery’s durability and strong performance and can essentially be perceived as a value-added feature. Conversely, our proficiency suggests that the Attwood PowerGuard Battery Boxes are outfitted with several additional features, such as vented covers and tie-down straps.

These extra attachments provide a solid foundation for battery placement and fortify the battery’s safety, mitigating potential hazards associated with leakage or spillage. Drawing from our experience of using these products, we concluded that the Attwood PowerGuard Battery Boxes pull ahead when it comes to accessories and additional features.

Despite the inherent benefit of the AGM technology in the Optima RedTop, the practical benefits offered by the Attwood PowerGuard’s supplementary features make it the preferable choice in this category.

Optima Batteries OPT8010-044 6V Starting Battery Review


  • Superior AGM technology
  • High CCA rating
  • Reliable performance


  • No explicit RC rating
  • May not fit standard battery trays

The Optima Batteries OPT8010-044 6V RedTop Starting Battery is a powerhouse of performance and durability. Its main benefit is AGM (Absorbent Glass Mat) technology. This means the battery has enhanced longevity and performance, offering you uninterrupted service for a longer time and saving you from frequent battery replacements.

Another benefit is its high CCA (Cold Cranking Amps) rating. This feature proves its worth when you’re stuck in cold weather and your vehicle needs that extra push to start. With Optima RedTop, those chilly morning starts are no longer a struggle, thanks to its superior cold-cranking amps.

The Optima RedTop also has a reputation for its reliability. It may not explicitly state its RC (Reserve Capacity) rating, but its robust design ensures it will power your vehicle even when your charging system fails. This reliability can be a lifesaver during long road trips when a battery failure could leave you stranded.

Attwood PowerGuard Battery Boxes Review


  • Universal fit design
  • Vented covers and tie-down straps
  • Robust and durable


  • Does not include battery
  • No additional performance enhancement

Attwood PowerGuard Battery Boxes are more than just a housing solution for your car battery; they bring a series of benefits that can make your life significantly easier.

The first benefit is their universal fit. No matter what size your car battery is, these boxes can accommodate it. This means you don’t have to worry about getting a new box whenever you change your battery.

Secondly, these battery boxes come with vented covers and tie-down straps. The vented cover helps prevent gas accumulation inside the box, enhancing safety, while the tie-down straps ensure that your battery stays in place, preventing any possible damage from movements.

Lastly, Attwood PowerGuard Battery Boxes are known for their robust and durable design. They are built to protect your battery from external impacts, effectively adding a layer of protection and extending the life of your battery.

Which Car Battery Size Is Better for My Vehicle: 24F or 35?

When choosing between a 24F and 35 car battery size, making a decision can be challenging. To help you compare, let’s look at the odyssey battery or optima: a comparison. Both brands offer high-quality options, but the final choice depends on your vehicle’s requirements, budget, and driving conditions. Consulting your manufacturer’s recommendations or seeking professional advice can ensure you make the right choice for your vehicle.


In conclusion, when it comes to the 24F vs 35 car battery debate, our analysis clearly showcases that the right choice depends heavily on your individual vehicle needs.

The Optima Batteries OPT8010-044 6V RedTop Starting Battery offers superior performance with its AGM technology and high CCA rating. It’s a robust battery that can give your vehicle that much-needed boost, especially in colder climates.

On the other hand, the Attwood PowerGuard Battery Boxes provide flexibility with their universal fit design and additional safety features. These boxes are a reliable solution to house your car battery safely. As a final recommendation, if you are in search of a high-performance battery, the Optima RedTop is the way to go. But if you are after a versatile and secure battery housing, the Attwood PowerGuard boxes are your best bet.

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