Here's a breakdown:
* Main Battery: This is the primary power source for the car. It starts the engine, powers the electrical system, and provides energy for the various components like lights, radio, and accessories.
* Trunk Battery: This is usually a secondary battery used for specific functions like powering the rear entertainment system, rear climate control, or even the rear seats in some luxury vehicles. It's not meant to run the whole car.
In short: The battery in the trunk is an auxiliary battery, not the main battery.
