Finding a reliable Group 25 battery for your car or marine motor engine can be challenging. There are many types and models to choose from, so it can be difficult to know exactly where to start.
That’s why we’re here!
We’ve compiled a list of the best Group 25 batteries along with a buying guide so you can make a more informed decision. This way, you’ll know exactly what to look for when buying a Group 25 battery for your vehicle.
Product
Image
Features
Where to buy
Optima RedTop
• High and consistent power supply
• Corrosion-resistant
• AGM technology boosts efficiency
• More durable than most batteries
Duralast Gold Battery 25-DLG
• Features the most number of plates and grids for maximum power
• Sturdy build
• Moderately priced
ProStart Group 25 Battery
• Manufactured with alloy to protect against battery failure
• Durable design
• Budget-friendly
Platinum Group 25 Battery
• Sturdy exterior
• Relatively high RC
• Long battery life
What is a Battery Group Number?
Battery Group Numbers are part of the standard set of car batteries put forward by the Battery Council International (BCI). These battery standards are specific for North American automotive and marine industries.
The BCI categorizes vehicle batteries according to their sizes as a way to differentiate between them. However, there are notable differences between each type of battery that goes far beyond just their sizes. These differences can affect your vehicle’s performance and overall efficiency.
For example, Group 25 batteries have specific dimensions set by the BCI. On average, they typically measure about 9 x 7 x 9 inches.
Things to Look for When Buying a Group 25 Battery
Manufacturers design their vehicles with a specific space for the battery. Since you know you’re looking for a Group 25 battery, here are some basic features to watch out for.
Cranking Amps
Cranking amps (CA) is a measure of the battery’s capability to supply an electrical current at 32℉. A battery’s CA is higher than its CCA because it’s measured at a higher temperature.
Group 25 batteries usually have a range of 750 to 1000.
Cold Cranking Amps
Colding cranking amps (CCA) measure the battery’s ability to produce electrical current for 30 seconds when you start the battery at 0℉. This rating is more important than CA because your car engine needs more power to start when the weather is cold.
Typical CCA ratings for standard cars are between 350 to 600amps. For bigger trucks, look for Group 25 batteries with higher ratings to give you more starting power during the cold winter months.
Reserve Capacity
Reserve capacity (RC) measures how long the battery can provide 25 amps of electrical current in minutes when idle before it gets discharged. The higher the RC rate, the more power, and longer run-time you get from your battery.
Amp Hours
You may not find this rating on all batteries. It tells you how much electrical current you get for a certain amount of time. For example, a battery with a 150 amp hour rating can provide 150 amps for 1 hour or 15 amps for 10 hours.
The 5 Best Group 25 Batteries
We scoured the internet searching for the best Group 25 batteries on the market and found these five. Let’s take a look!
1. Optima RedTop
: Best Overall
One of the advantages of the Optima 25 battery is that it features Absorbent Glass Mat (AGM) technology. This cutting-edge innovation is incorporated into the battery’s design and helps make it impervious to vibrations and shocks. AGM also boosts the battery’s efficiency. Moreover, it ensures its ability to meet the high demands of powering car engines and a wide range of car electronics.
A handy feature that caught our eye is the RedTop features 850 cold-cranking amps. This is plenty of power to start up your car even when the weather is freezing. Another feature we like is that this group 25 battery has a reserve capacity of 130 minutes. This guarantees a steady power supply that remains consistent for a long time.
Pros
- High and consistent power supply
- Corrosion-resistant
- AGM technology boosts efficiency
- More durable than most batteries
Cons
- Less affordable than other battery models
2. Duralast Gold Battery 25-DLG: Runner-Up
The Duralast Gold Battery is capable of delivering reliable and consistent power. It’s manufactured from impact-resistant polypropylene to lessen the damage caused by vibration. This durable design also boosts your vehicle’s overall performance.
Thanks to its 685 CA and 550 CCA, this Group 25 battery has all the power you need to get your car running even in extreme weather. Plus, with a 100 reserve capacity rating, you can rest assured that your battery will keep supplying you with power for a long time.
One of its best qualities is it has the largest number of grids and plates allowed on a battery. They work to provide your car with the most amount of power possible during start-up. Also, they maintain a consistent power supply throughout. The one drawback is that they make the battery heavier than other models.
Pros
- Features the most number of plates and grids for maximum power
- Sturdy build
- Moderately priced
Cons
- Relatively heavy
3. ProStart Group 25 Battery: Best Value
The ProStart battery is designed with leading technology to provide longer battery life and boost your vehicle’s performance. It’s one of the most reliable and durable Group 25 batteries on the market. Add to that its budget-friendly price point, and you have yourself a winning product.
One of this battery’s best features is that it’s made with alloy. This ensures that the battery is protected against corrosion and failure, which can result from extreme cold or heat.
During these extreme weather conditions, the ProStart provides your car with 600 CCA. That’s more than enough starting power for your car all year round. On the other hand, we found the reserve capacity rating of 80 to be quite low for such a powerful battery.
Pros
- Manufactured with alloy to protect against battery failure
- Durable design
- Budget-friendly
Cons
- Low reserve capacity
4. Platinum Group 25 Battery
The Platinum Group 25 battery is a formidable product in the world of automation. Featuring a CCA of 550, you can rely on this battery to get your car started in all weather conditions. At an impressive RC of 110 minutes, you know that this battery can deliver.
While we like the dependability and long lifespan of having a flooded lead-acid battery, there are some precautions you have to take. One is that this battery has to be placed in a vertical position. This is to prevent the electrolytes from leaking or spilling out of the top of the battery case.
Pros
- Sturdy exterior
- Relatively high RC
- Long battery life
Cons
- May leak if not properly mounted in the battery compartment
5. MOTOMASTER Group Size 25 Battery
MOTOMASTER Group 25 batteries are designed for high-performance. We like the maintenance-free design that consists of heavy-duty plates, straps, and welds.
We like how these parts work well together to resist vibration and shocks. They also help boost the transfer of current, which, in turn, maximizes your vehicle’s performance.
Speaking of performance, we were also impressed with this battery’s power capacity. It boasts a CA rating of 675 and a CCA rating of 550—both ratings are sufficient to provide steady power. Another notable feature is its RC rating of 90 minutes to keep your car going for longer.
Pros
- Durable, maintenance-free design
- Reasonably-priced
Cons
- Doesn’t hold up in cold weather as well as other models
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