Group 47 (H5, L2, 55L2) Batteries: Dimensions, Features, and Applications

What Are Group 47 (H5, L2, 55L2) Batteries?

Group 47 batteries, also labeled H5, L2, or 55L2 depending on regional standards, are mid-sized automotive batteries with dimensions of approximately 10.9 x 7.5 x 8.8 inches. They deliver 70-85 Ah capacity and 650-750 CCA, powering vehicles with moderate electrical demands like sedans, SUVs, and light trucks. Their compatibility with AGM or flooded cell technology makes them versatile for modern start-stop systems.

What Is a Group Size 24 Battery?

What Are the Key Dimensions of Group 47 Batteries?

Group 47 batteries measure 10.9 x 7.5 x 8.8 inches (LxWxH) and weigh 35-45 lbs. Terminal placements vary: JIS L2 types have reversed terminals compared to DIN H5 designs. These dimensions ensure compatibility with battery trays in vehicles like Honda Accords, Subaru Outbacks, and select European models. Always verify terminal orientation and hold-down bracket requirements before installation.

How Do Group 47 Batteries Compare to Group 48 or 49?

Group 47 batteries are smaller than Group 48 (12.4 x 6.9 x 7.5 inches) and Group 49 (15 x 7 x 7.5 inches), making them ideal for compact engine bays. While Group 49 offers higher capacity (80-100 Ah), Group 47 balances size and power for everyday vehicles. AGM variants outperform flooded types in vibration resistance and cycle life.

Which Vehicles Use Group 47 Batteries?

Common applications include Honda Accord (2013-2022), Subaru Outback (2010-2024), Toyota Camry Hybrid, and European models like Volvo XC60. Their compatibility with advanced charging systems and energy recovery mechanisms makes them suitable for hybrids and start-stop vehicles. Always check OEM specifications for terminal placement and reserve capacity requirements.

Vehicle Model	Model Years	Battery Type
Honda Accord	2013-2022	AGM/Flooded
Subaru Outback	2010-2024	AGM
Volvo XC60	2015-2023	AGM

Manufacturers increasingly use Group 47 batteries in vehicles with advanced driver-assistance systems (ADAS) due to their stable power output. The compact size allows integration with hybrid powertrains where space is limited. For example, the Toyota Camry Hybrid uses a Group 47 battery to support its regenerative braking system without compromising trunk space.

What Features Define High-Quality Group 47 Batteries?

Premium Group 47 batteries feature AGM (Absorbent Glass Mat) technology for spill-proof operation, 20% longer cycle life, and faster recharge rates. Look for warranties exceeding 48 months, dual-purpose designs (supporting deep cycling), and corrosion-resistant terminals. Brands like Odyssey, Interstate, and Bosch prioritize stamped grids and advanced lead-calcium alloys for durability.

How Does Climate Affect Group 47 Battery Performance?

In cold climates, CCA (Cold Cranking Amps) above 700 ensures reliable starts at -18°C. AGM batteries maintain efficiency in heat up to 50°C due to sealed construction. For extreme temperatures, opt for batteries with reinforced plates and electrolyte circulation systems. Regular voltage checks (12.6V+ when idle) prevent sulfation in fluctuating conditions.

Are Group 47 Batteries Compatible With Aftermarket Electronics?

Yes, AGM Group 47 batteries support aftermarket audio systems, GPS, and auxiliary lighting. Their enhanced charge acceptance (up to 5x faster than flooded) suits high-drain setups. Ensure alternator output matches battery specifications—under 150A for standard models. For dual-battery systems, use isolators to prevent deep discharge.

What Maintenance Extends Group 47 Battery Lifespan?

Clean terminals quarterly with baking soda solution to prevent corrosion. Maintain charge levels above 12.4V using smart chargers. Avoid deep discharges below 50% State of Charge (SOC). For stored vehicles, disconnect negative terminals or use maintenance chargers. AGM batteries require no watering but benefit from annual load tests.

Maintenance Task	Frequency	Tools Required
Terminal Cleaning	Every 3 Months	Baking Soda, Wire Brush
Voltage Check	Monthly	Multimeter
Load Test	Annually	Battery Load Tester

Implementing a battery monitoring system can extend lifespan by 18-24 months. These devices track voltage fluctuations and alert users to abnormal discharge patterns. For AGM batteries, avoid using traditional chargers with desulfation modes—they can overheat the sealed cells. Instead, use AGM-specific chargers that regulate voltage to 14.4-14.8V during charging cycles.

How to Recycle Group 47 Batteries Responsibly?

Over 98% of lead-acid battery components are recyclable. Return used Group 47 batteries to retailers or EPA-approved centers. Never dispose of in landfills—lead and sulfuric acid contamination risks fines up to $10,000. Many states mandate core charges ($10-$20) refunded upon return.

“Group 47’s standardization across regions simplifies inventory for manufacturers, but consumers must verify regional labeling. For example, a European H5 might lack side terminals common in North American L2 variants. AGM adoption is rising—30% of replacements now use this tech for its deep-cycling in hybrids.” — Automotive Battery Engineer, 15+ years in energy storage

FAQs

Q: Can I replace a flooded Group 47 battery with AGM?

A: Yes, if your charging system supports AGM’s higher voltage requirements (14.4-14.8V). Consult your vehicle manual first.

Q: Why does my Group 47 battery have different terminal layouts?

A: Terminal positions vary by regional standards—JIS (Japan) uses reverse polarity for L2 vs. DIN (Europe) H5 designs.

Q: How long do Group 47 batteries typically last?

A: 3-5 years for flooded, 4-7 years for AGM, depending on usage and maintenance.