What is the reason for having power in the battery but the car not starting?

[BenjaminLynn]

It may be because the gear is in D (Drive) position, which prevents the car from starting. This is a protective mechanism of the car to prevent sudden movement after ignition. Here is some information about car batteries: 1. Introduction: A car battery is a type of battery, also called a storage battery, whose working principle is to convert chemical energy into electrical energy. The battery commonly referred to is a lead-acid battery, which mainly uses lead and its oxides as electrodes and sulfuric acid solution as the electrolyte. 2. Principle: It uses lead plates filled with sponge lead as the negative electrode, lead plates filled with lead dioxide as the positive electrode, and 22-28% dilute sulfuric acid as the electrolyte. During charging, electrical energy is converted into chemical energy, and during discharging, chemical energy is converted back into electrical energy.