Group 48 Batteries
Batteries for
Finding the right battery isn’t just about making your car start - it’s about choosing reliable power you can count on every day. Group 48 batteries have earned a strong reputation because they deliver the right mix of starting strength, reserve power, and dependable performance.
They are trusted across industries and everyday drivers alike for a reason. Before we get into why they stand out, let’s take a closer look at what these batteries actually are.
What Are Group 48 Batteries?
The group 48 battery is one of the most trusted and widely used BCI (Battery Council International) group sizes available today. Known for its compact size and balanced power output, it fits perfectly into a wide range of vehicles and equipment.
Group 48 batteries match several international sizing standards, including DIN H6 (L3) and EN 66L3. This cross-compatibility makes them an easy replacement for many European and American vehicles, giving you more flexibility when choosing a high-performance battery.
Key Performance Specs
When selecting a group 48 battery, it's important to look beyond physical size and understand the performance metrics that determine real-world reliability. These batteries are engineered to meet the power needs of today’s vehicles, especially those with modern electronics and increased energy demands.
Group 48 batteries operate at a standard 12 volts, which is compatible with most cars, trucks, SUVs, and even certain marine and RV setups. This voltage is the foundation for reliable starts and consistent power delivery.
Cold Cranking Amps (CCA) for group 48 typically range between 680 and 795 amps. That means a strong, reliable engine starts even in cold temperatures, critical for winter conditions or high-drain systems that require immediate bursts of power.
Reserve Capacity (RC) generally falls between 100 and 135 minutes. This refers to how long the battery can supply power to essential systems when the engine is off. A higher RC is especially important for vehicles that run accessories like lights, stereos, or navigation when parked.
Amp-hour (Ah) capacity usually ranges from 60Ah to 70Ah, giving these batteries solid mid-range storage capacity. This makes them a great fit for vehicles with moderate to heavy electrical loads or for drivers who want a balance between starting power and deep cycling potential.
Construction & Internal Design
Not all batteries are built the same internally. The design and thickness of the internal plates play a major role in determining how the battery performs, how long it lasts, and what types of vehicles or applications it best supports.
Thick plate group 48 batteries are typically designed for deep cycle durability. These batteries are built to deliver steady power over longer periods and withstand repeated discharging and recharging. They are ideal for RVs, marine systems, and vehicles running auxiliary loads like winches, inverters, or extended lighting systems.
Thin plate designs are optimized for stop/start systems and vehicles that require high bursts of starting power with quick recharge times. These batteries excel at delivering strong cold starts and handling frequent engine stops and restarts, which are common in newer fuel-saving vehicle technologies.
Many of them are built as dual-purpose options, blending the strengths of both thick and thin plate designs. A dual-purpose group 48 battery offers reliable starting power while also providing moderate deep cycling capabilities. This makes them versatile enough for vehicles that demand both daily drivability and occasional heavy accessory use without sacrificing battery health or longevity.
Understanding the internal construction helps ensure you're choosing a 48 battery that matches your driving habits, vehicle needs, and long-term performance expectations.
Physical Dimensions
The typical physical dimensions are approximately 10.90 inches in length, 6.90 inches in width, and 7.50 inches in height. This compact profile is specifically designed to fit snugly into today's tighter engine bays and battery trays, reducing the need for modifications during installation.
These batteries are especially valued for their balance between physical size and internal capacity. While compact enough for efficient under-hood layouts, they still deliver the high cranking power and reserve capacity drivers expect. Thanks to strict BCI standards, upgrading or replacing your battery is straightforward for late-model SUVs, sedans, or crossovers.
By maintaining these universal dimensions, a 48 battery ensures you won’t face compatibility issues when switching brands or upgrading to a higher-performance model.
Battery Types Available in Group 48
48 batteries come in several advanced types, each built for different driving demands and performance needs. Understanding the differences can help you select the most suitable option for your vehicle.
Flooded Lead-Acid Batteries
Flooded lead-acid batteries are a reliable and budget-friendly choice for many standard vehicles. They use traditional liquid electrolyte designs and deliver consistent starting power. However, they require occasional maintenance, such as checking fluid levels and cleaning terminals, to ensure long-term performance and prevent early wear.
AGM (Absorbent Glass Mat) Batteries
AGM batteries are a maintenance-free upgrade designed for modern vehicles with higher electrical demands. They feature a sealed design that resists vibration, recharges faster, and delivers excellent cold cranking amps (CCA).
AGM technology is ideal for cars equipped with premium sound systems, advanced electronics, and vehicles operating in extreme climates.
EFB (Enhanced Flooded Batteries)
Enhanced Flooded group 48 batteries, often called EFBs, are engineered for vehicles with stop/start systems. They offer greater cycle life, faster charge acceptance, and stronger performance during frequent engine stops and restarts compared to standard flooded designs.
EFB batteries provide a durable, cost-effective alternative for drivers who want improved efficiency without the higher cost of AGM.
Common Applications
A group 48 battery is a common fit for cars, SUVs, and light trucks, giving enough cold cranking amps (CCA) to start engines even in freezing conditions. Many vehicles with start-stop systems also rely on this size for quick, repeated starts.
On the water, it’s used in small boats and watercraft, where tough, vibration-resistant power is needed to run motors and electronics safely. RV owners count on this battery size to keep lights, appliances, and small devices working while off-grid. It’s also a smart choice for backup power systems, helping essential electronics stay online during outages.
Because of its balanced size, reserve capacity, and reliability, this battery is trusted for both everyday driving and off-grid adventures.
Cars, SUVs, and light trucks
Boats and small watercraft
RVs and camper power systems
Off-grid backup setups
UPS units for emergency power
Common Vehicles That Use a Group 48 Battery
Group 48 batteries are widely used across many brands and vehicle types. They offer the perfect balance of size, power, and fitment for a wide range of cars, SUVs, and even performance vehicles. Here are some common examples:
Acura: Mdx, Rdx, Tlx
Audi: A3, A4, A5, Q3, R8, S3
Bmw: 128i, 135is, 328xi, Z3
Buick: Allure, Enclave, Regal, Verano
Cadillac: Ats, Escalade, Sts
Chevrolet: Avalanche, Camaro, Equinox
Ferrari: 360, 458, 488
Ford: Edge, Focus, Transit
Gmc: Sierra, Yukon
Hyundai: Elantra, Sonata, Tucson
Kia: Optima, Rio, Sportage
Maserati: Coupe, Gransport, Spyder
Mercedes-benz: Amg, C250, C300, Metris, Slk350
Mini: Cooper
Saab: 9-5
Saturn: Outlook, Vue
Volkswagen: Atlas, Beetle, Golf, Jetta, Passat
Volvo: C70, S60, V60, Xc60
Maintenance Requirements
Not every group 48 battery needs the same kind of care. It depends on what type you have.
Flooded batteries need regular attention. You have to check the electrolyte levels inside and sometimes add water if they get low. It's also a good idea to clean the battery terminals once in a while, so the connections stay strong.
AGM and EFB batteries are different. They are sealed, maintenance-free designs. You don't have to add water or open them up. They are built to handle vibration, heat, and lots of start-stop cycles without needing extra work.
If you want the easiest option, most people go for an AGM battery, especially if they don't want to think about battery upkeep for years.
Why Choose Impact Battery?
When it comes to buying a new group 48 battery, you deserve more than just a product listing - you deserve real support, trusted quality, and peace of mind. That’s exactly what Impact Battery delivers.
We carefully curate our inventory, offering only batteries that meet the highest standards for performance, reliability, and longevity. Every 48 battery we sell is tested for cold cranking amps (CCA), reserve capacity (RC), and overall build quality, so you can be confident you’re getting the best fit for your vehicle or power system.
Our team isn't just here to sell batteries - we’re here to help. Whether you need advice on selecting between AGM and flooded options, matching a battery to your start-stop vehicle, or finding the best choice for marine or RV use, our battery experts are ready to guide you.
Impact Battery also makes your experience easier with fast U.S. shipping, safe packaging, and straightforward warranty support. We handle your order with care from start to finish.
Choosing Impact Battery means choosing reliability, expertise, and real customer service - every time you power up.
How to Choose the BCI Group 48 Battery?
Choosing the right battery isn’t complicated once you know what matters. It's all about matching the battery's power and features to how you use your vehicle or equipment. Here's what to focus on:
1. Check Your Power Needs
Start with your vehicle’s demands. If you drive a newer car with a lot of electronics, like touchscreens, sensors, and start-stop systems, you’ll want a group 48 AGM battery. AGM technology handles high electrical loads better and recharges faster after short trips.
If you drive an older vehicle without a lot of electronics, a flooded battery can save you money while still delivering reliable starts.
2. Think About Your Climate
Live in a cold area? Look for a group 48 battery with a high Cold Cranking Amps (CCA) rating. Higher CCA means easier starts on freezing mornings.
In hot climates, focus on batteries with strong vibration resistance and sealed designs like AGM, which handle heat better over time.
3. Decide on Maintenance
If you want a "set it and forget it" option, go for a maintenance-free AGM or EFB 48 battery.
Flooded batteries work fine but need occasional checks on fluid levels and terminal cleaning.
For busy drivers- or anyone who just wants less hassle, AGM is usually the smarter pick.
4. Match the Battery Type to Your Driving Style
Short trips, city driving, lots of stop-and-go? → Choose an AGM or EFB battery for better recovery and longer life.
Long highway drives and light accessory use? → A flooded battery could meet your needs for less money.
5. Always Confirm Fitment
Although 48 batteries are a standardized size, it’s advisable to verify your vehicle’s specifications. Look at your current battery label, your owner's manual, or use a battery fitment tool to be 100% sure you’re picking the right replacement.
Frequently Asked Questions
Got questions? We’ve got you covered. Here are quick answers to the most common things people ask about
What is a group 48 battery equivalent to?
These batteries are the same size as DIN H6, L3, and 66L3 batteries. If your car manual says any of those, a group 48 will fit just fine.
Is H7 group 48?
No, H7 and group 48 are not exactly the same. They are close in size, but H7 (also known as group 94R) is slightly larger and has the terminals in a different location.
How long does a 48 battery last?
Most of the batteries last 3 to 6 years. AGM types usually last a little longer, especially if you drive a lot or live in a tough climate.
What is Cold Cranking Amps (CCA), and why does it matter?
Cold Cranking Amps (CCA) measure how much power a battery can deliver to start your engine in cold weather. A higher CCA means your car will start easily when it’s freezing outside. If you live in a colder area, a 48 battery with strong CCA helps your vehicle start faster and keeps the battery healthier longer.
How do I know if a group 48 battery will fit my car?
Look at your owner’s manual, your old battery’s label, or use a battery fitment tool online. The 48 batteries fit lots of vehicles, but it's always smart to check.
Are group 48 batteries good for stop/start vehicles?
Yes, but you should pick an AGM or EFB battery. They are made to handle the extra work from engines that turn off and on at stoplights.
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