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Rechargeable batteries are batteries that can be recharged multiple times after being depleted. They are commonly used in electronic devices such as smartphones, laptops, and electric vehicles.

There are several types of rechargeable batteries, including:

Lithium-ion (Li-ion) batteries: These are the most common type of rechargeable battery, offering high energy density and long cycle life. They are used in a wide range of devices, including smartphones, laptops, and electric vehicles.
Nickel-metal hydride (Ni-MH) batteries: These batteries offer good performance and are commonly used in rechargeable batteries for remote controls, cordless phones, and power tools.
Nickel-cadmium (Ni-Cd) batteries: These batteries have a long history but are less common today due to their memory effect and environmental concerns.

Rechargeable batteries have significantly reduced the need for disposable batteries, contributing to environmental sustainability. They offer convenience and cost savings in the long run.