The Ridgeline uses a standard twelve-volt automotive battery—the common lead-acid type that is usually sealed and maintenance-free.
In other words, it relies on a conventional 12V battery to start the V6 engine and power electrical systems when the engine isn’t running. When replacing, owners should verify the correct group size and cold-cranking amps (CCA) as listed in the owner’s manual or on the current battery label to ensure a proper fit and performance.
Battery type and replacement considerations
The stock setup is a typical 12V lead-acid battery designed to be maintenance-free and to fit within a standard group size used by mid-size pickups. Replacements should meet or exceed the original CCA and reserve capacity (RC) ratings and match the physical size for the tray and terminals.
Maintenance-free versus AGM and labeling
Most 2008 Ridgeline batteries are maintenance-free, sealed lead-acid units. AGM (absorbent glass mat) batteries are available, but they are not the factory standard for this model. If choosing an AGM, confirm fitment and electrical compatibility with Honda’s specifications for your vehicle’s year and engine.
How to identify the exact specification
Look at the battery label for the voltage (12V), the group size code, and the CCA/RC ratings. The owner’s manual or a dealership service advisor can confirm the exact specification for your VIN, and auto parts retailers can verify the correct group size when you provide year, make, model, and engine.
Summary
The 2008 Honda Ridgeline takes a standard 12-volt lead-acid automotive battery, typically maintenance-free. For replacement, match the group size and CCA to the vehicle’s original specifications, and consult the owner’s manual or a parts professional to ensure a proper fit and reliable performance.