Lead-acid batteries are one of the oldest and most widely used types of rechargeable batteries. They are commonly used in vehicles, backup power supplies, and other applications requiring high values of load current. These batteries are made up of lead plates and an electrolyte solution of sulfuric acid and water.
Limited energy density: They have a lower energy density than lithium-ion batteries, resulting in a lower capacity and shorter runtime. Maintenance requirements: Lead acid batteries require periodic maintenance, including electrolyte level checks and occasional equalization charging. Applications
Compared to modern rechargeable batteries, lead–acid batteries have relatively low energy density. Despite this, they are able to supply high surge currents. These features, along with their low cost, make them attractive for use in motor vehicles to provide the high current required by starter motors.
On the other hand, lithium batteries are generally considered to be safer than lead-acid batteries. This is because lithium batteries do not contain any corrosive or toxic materials, and they are less likely to explode or catch fire.
Disadvantages: Heavy and bulky: Lead acid batteries are heavy and take up significant space, which can be a limitation in specific applications. Limited energy density: They have a lower energy density than lithium-ion batteries, resulting in a lower capacity and shorter runtime.
The electrolyte is usually a lithium salt dissolved in an organic solvent. Lithium batteries have a higher energy density than lead-acid batteries, meaning they can store more energy in a smaller space. This is because lithium is lighter than lead, and lithium compounds have a higher voltage than lead compounds.