Odyssey Battery ODX-AGM3478 Vehicle Battery

Odyssey AGM2 Automotive Battery

The Odyssey Battery ODX-AGM3478 is a 12-volt AGM automotive battery built with Thin Plate Pure Lead (TPPL) technology for strong starting performance and fast recharge acceptance. With 850 cold cranking amps and 68 amp hours, it is a direct-fit option for many trucks, vans, SUVs, and performance cars that use Group 34/78 sizing.

Fits 1996-2017 Chevrolet Express 2500, N/A and fits 1996-2017 GMC Savana 3500, N/A, along with a wide range of other applications across Chevrolet, GMC, Jeep, Dodge, and Cadillac platforms.

• Odyssey AGM2 TPPL construction for high power density
• 12 DC voltage with 68 amp hours of capacity
• 850 CCA and 1500 cranking amps for strong engine starts
• Group 34/78 case size for broad vehicle coverage
• Dimensions: 10.850 in. long, 6.760 in. wide, 7.820 in. high
• Designed for automotive starting and electrical demands

TPPL Battery Line Details

Odyssey AGM2 batteries use thin plate pure lead construction, which allows more plates inside the case than a conventional battery design. That layout supports higher power output, quicker charge acceptance, and longer service life than standard flooded SLI batteries, while also improving durability for demanding daily use.

This part cross-references Champion Spark Plug 34 and OSC 78 for the same application. Part number ODX-AGM3478 is also listed for Group 34/78 fitments that require left-side positive orientation in select Chevrolet Express and GMC Savana models.

Common Uses

• Slow cranking or weak starting in cold weather
• Battery replacement for Group 34/78 vehicles with high electrical demand
• Frequent recharge cycles from short-trip driving
• Starting issues in vans, SUVs, and trucks with accessory loads
• Replacement for aging AGM or flooded batteries

Installation Notes

Verify Group 34/78 fitment, terminal orientation, and battery tray clearance before installation. Confirm the vehicle’s positive-side location and check whether the application notes specify engine-compartment mounting or a primary battery position. For vehicles listed with dual-battery notes, follow the factory configuration.

Quality Assurance

Odyssey AGM2 batteries are engineered around TPPL technology to improve power delivery, fast-charge acceptance, durability, and service life compared with conventional battery designs. ODX-AGM3478 is built for automotive starting applications where consistent cranking performance and dependable electrical support matter.