Lead-acid batteries are one of the oldest and most widely used types of batteries in the world. They are known for their reliability, long life, and low cost. However, there are different types of lead-acid batteries, each with their own unique characteristics and applications. Here is an overview of the main types of lead-acid batteries: Flooded Lead-Acid Batteries: These are the most common type of lead-acid batteries and are also known as "wet cell" batteries. They consist of lead plates submerged in an electrolyte solution of sulfuric acid and water. They require regular maintenance, such as adding water to the cells to keep the plates submerged. Flooded lead-acid batteries are commonly used in automobiles, boats, and backup power systems. Sealed Lead-Acid Batteries: These batteries are also known as "valve-regulated lead-acid" (VRLA) batteries. They are sealed and do not require regular maintenance, such as adding water to the cells. They are commonly used in