Which of the following is the lightest but most expensive battery used in laptops?

A.
NiMH

B.
NiCad

C.
Li-Ion

D.
Sodium-Ion

Explanation:
Li-Ion or Lithium Ion battery is the lightest but most expensive battery used in laptops. Li-Ion battery
has a longer life as compared to NiCad and NiMH batteries.
Answer option B is incorrect. Nickel-Cadmium (NiCad) batteries are no longer used in laptops. NiCad
batteries are heavy and have shorter life as compared to NiMH batteries.
Answer option D is incorrect. There is no battery such as Sodium-Ion.
Answer option A is incorrect. A Nickel-Metal Hydride (NiMH) battery has 30 percent more life than a
NiCad battery. NiMH is more expensive and takes more time to recharge as compared to NiCad.
Some laptops still use NiMH batteries.