Group 48 Batteries (H6)

Experiencing slow engine cranks or a clicking sound when you turn your key? A weak battery can leave you stranded. Group 48 batteries (also called H6 or L3) power most cars, trucks, and SUVs on the road. At Battery Mart, we carry heavy-duty Group 48 replacement batteries with strong cold-cranking power and long-lasting performance. Browse our selection below to find the right replacement for your vehicle.

Experiencing slow engine cranks or a clicking sound when you turn your key? A weak battery can leave you stranded. Group 48 batteries (also called H6 or L3) power most cars, trucks, and SUVs on the road. At Battery Mart, we carry heavy-duty Group 48 replacement batteries with strong cold-cranking power and long-lasting performance. Browse our selection below to find the right replacement for your vehicle.

Marathon 9AGM48 H6 AGM Battery (Group 48) - 760 CCA, 70Ah, 12V

Item #: MAR-AGM-48
 
Voltage: 12 Volt / 70 Ah / 760 CCA
• AGM
• Dimensions: 11" / 6.94" / 7.5"
• Weight: 46.60 lbs
• Warranty: 1 Year
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Price:
$199.95
Price: $199.95
QTY:

Odyssey ODP-AGM48 H6 L3 Performance Battery (48-720)

Item #: 48-720
 
Voltage: 12 Volt / 70 Ah / 760 CCA
• AGM
• Dimensions: 10.91" / 6.89" / 7.5"
• Weight: 51.55 lbs
• Warranty: 2-3 Year (Warranty Info)
MSRP: $362.99
Price:
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Antigravity H6 / Group 48 Lithium Car Battery (40Ah)

Item #: AG-H6-40-RS
 
Voltage: 12.8 Volt / 40 Ah / 1500 CCA
• LiFePO4
• Dimensions: 10.75" / 7" / 7.5"
• Weight: 17.50 lbs
• Warranty: 5 Year Factory Direct - Warranty Info (PDF)
• See All Compatible Models
Price:
$949.99
Price: $949.99
QTY:

What You Need to Know About Group 48 Batteries

Group 48 batteries are among the most common automotive battery sizes used by major manufacturers. You'll often see this size listed as BCI Group 48, DIN H6, or EN L3. They're installed in popular vehicles from brands like Chevrolet, GMC, Ford, BMW, Audi, Volkswagen, and Jeep.

A reliable battery is essential for starting your engine, powering your headlights, and running your cabin electronics. The right replacement offers these key benefits:

  • Dependable Cold-Weather Starts: High cold cranking amps (CCA) deliver the power needed to start cold engines on freezing mornings.
  • Durable Construction: Heavy-duty internal grids resist vibration and heat for longer service life.
  • Consistent Power Delivery: Maintains steady voltage for modern onboard computers and accessories.

How to Choose the Right Group 48 Battery

You'll generally choose between two main types:

  • Standard Flooded Batteries: Cost-effective lead-acid batteries that deliver reliable starting power for most vehicles. They're maintenance-free with proven performance. (Due to hazardous shipping restrictions, we do not offer Flooded batteries online.)
  • AGM (Absorbent Glass Mat) Batteries: AGM batteries offer twice the lifespan, faster recharging, and superior resistance to heavy electrical loads. If your vehicle came with an AGM battery or has automatic start-stop technology, you must replace it with an AGM unit.
  • LiFePO4 (Lithium) Batteries: Lightweight, high-performance lithium batteries like the Antigravity AG-H6-40-RS deliver exceptional starting power with minimal weight. Ideal for performance enthusiasts and vehicles requiring maximum reliability and reduced electrical load on the charging system.

Check your vehicle owner's manual or current battery label to confirm cranking amps and terminal orientation. For fitment questions, contact our customer service team.

Frequently Asked Questions

Is a Group 48 battery the same as an H6 battery?

A: Yes. Group 48 is the North American standard (BCI), while H6 or L3 are European designations. They have identical dimensions and terminals and are fully interchangeable.

Can I replace a standard flooded battery with an AGM Group 48 battery?

A: Yes, upgrading to AGM gives you better starting power and longer life. However, don't downgrade from an AGM battery to a standard flooded type if your vehicle came with AGM from the factory.

What are the physical dimensions of a Group 48 battery?

A: A Group 48 battery measures approximately 11 inches long, 6.9 inches wide, and 7.5 inches tall. Verify your battery tray space for a proper fit.

What if I order the wrong battery size for my vehicle?

A: We accept returns within 60 days of purchase. Review our simple 60-day return policy for exchanges or returns.