A
secondary battery is a type of battery that can be
recharged and used multiple times. Unlike
primary batteries, which can only be used once, secondary batteries allow electrical energy to be stored and reused by reversing the chemical reactions through charging.
Examples of Secondary Batteries:
- Lithium-Ion (Li-ion) Battery – Used in smartphones, laptops, and electric vehicles.
- Lead-Acid Battery – Common in cars, motorcycles, and backup power systems.
- Nickel-Cadmium (Ni-Cd) Battery – Used in power tools, medical devices, and emergency lighting.
- Nickel-Metal Hydride (Ni-MH) Battery – Found in hybrid cars and rechargeable AA/AAA batteries.
- Sodium-Ion Battery – A newer alternative to lithium-ion, used in energy storage applications.
These batteries are widely used in portable electronics, electric vehicles, and renewable energy storage systems.