Lithium-ion batteries are a type of rechargeable battery that are used in a wide range of applications, including:

1. Consumer electronics: Lithium-ion batteries are commonly used in smartphones, laptops, tablets, and other portable electronic devices due to their high energy density and low weight.

2. Electric vehicles: Lithium-ion batteries are used to power electric vehicles due to their high energy density and long lifespan.

3. Energy storage: Lithium-ion batteries can be used to store excess power produced by solar panels, making them ideal for energy storage systems.

4. Backup power: Lithium-ion batteries can provide backup power for critical equipment such as medical technology, communication technology, and computers.

5. Marine performance: Lithium-ion batteries are lightweight and efficient, making them ideal for use in boats and yachts.

6. Remote monitoring systems: Lithium-ion batteries are ideal for remote monitoring systems due to their long lifespan and low self-discharge rate.

7. Mobility equipment: Lithium-ion batteries are used to power mobility aids such as electric wheelchairs and scooters.

In addition to these applications, lithium-ion batteries are also used in mining, manufacturing, and energy storage. It is important to note that lithium-ion batteries contain hazardous materials and should be properly managed at the end of their useful life to prevent harm to human health or the environment.