Question

which of the following is a rechargeable battery with the highest energy density currently in use?
○ a. lead - acid
○ b. nickel - cadmium
○ c. nickel - metal hydride
○ d. lithium - ion

Explanation:

Lithium - ion batteries have a higher energy density compared to lead - acid, nickel - cadmium, and nickel - metal hydride batteries. This is due to the chemical properties of lithium, which allows for more energy storage per unit mass or volume.

Answer:

d. Lithium - ion