Which battery type is commonly used in automobiles?

• A. Lithium Batteries
• B. Lead-Acid
• C. Nickel-Cadmium Batteries
• D. Alkaline

Answer: (B)

The main idea is that a car battery must deliver a large amount of current quickly to start the engine, while also withstanding constant charging from the alternator, vibration, and temperature changes, all at a low cost. Lead-acid batteries are designed to meet this need. They can supply a strong surge of current needed to crank the engine, then be easily recharged by the alternator as the engine runs. They’re also inexpensive and robust, which is why they’ve become the standard in most conventional automobiles.

Lithium batteries, while they offer higher energy density and are used in some modern vehicles for auxiliary power or in certain hybrid/electric setups, are typically more expensive and require more complex charging and thermal management, so they aren’t the universal starter battery in most cars. Nickel-cadmium batteries have fallen out of favor for automotive use due to weight, cost, and environmental concerns. Alkaline cells are generally primary, non-rechargeable cells and aren’t suitable for the repeated charging cycles required by starting and charging a car.