A Rechargeable battery is a versatile energy storage solution designed for repeated use, allowing it to be charged and discharged multiple times. These batteries are widely used in various applications, from portable electronics and electric vehicles to renewable energy systems and household devices. Key types include lithium-ion, nickel-metal hydride (NiMH), and lead-acid batteries, each offering unique advantages in terms of energy density, lifespan, and performance. Rechargeable batteries are eco-friendly, cost-effective, and contribute to reducing environmental waste by minimizing the need for disposable batteries.