Which statement best describes the purpose of a battery?

Which statement best describes the purpose of a battery?

• A. It converts electrical energy to chemical energy and stores it
• B. It stores chemical energy to provide mechanical energy
• C. It creates energy from fuel
• D. It stores chemical energy and converts it into electrical energy when connected to a load

Answer: (D)

A battery stores energy in chemical form and releases that energy as electrical energy when a circuit is completed with a load. Inside the cells, chemical reactions hold energy in the form of chemical bonds, and when a load is connected, those reactions drive electrons to flow, delivering power to the connected device. The energy isn’t created from fuel, nor is it stored to directly provide mechanical energy; it is stored chemically and converted to electrical energy for use. Charging reverses the process by applying electrical energy to restore the chemical energy.

A battery stores energy in chemical form and releases that energy as electrical energy when a circuit is completed with a load. Inside the cells, chemical reactions hold energy in the form of chemical bonds, and when a load is connected, those reactions drive electrons to flow, delivering power to the connected device. The energy isn’t created from fuel, nor is it stored to directly provide mechanical energy; it is stored chemically and converted to electrical energy for use. Charging reverses the process by applying electrical energy to restore the chemical energy.