For the gasoline-powered R8 models (V10 and V10 Performance):
* 12V Lead-Acid Battery: These are the standard batteries for starting the engine and powering the car's electrical systems.
For the R8 e-tron (electric version, discontinued):
* Lithium-ion Battery: The R8 e-tron featured a high-capacity lithium-ion battery pack that powered the electric motors.
Important Note: There is no current production hybrid version of the Audi R8.
If you have a specific R8 model in mind, please provide the year and trim level, and I can give you more precise information.