The technical breakthrough of new lithium-ion battery almost completely replaced the nickel-cadmium (Ni-Cd) batteries in the market. How is Lithium-ion battery different from Ni-Cd battery?

  1. While Lithium-ion battery is primary battery, Ni-Cd is secondary battery
  2. The energy density of lithium-ion is much higher than that of the standard nickel-cadmium. 

Which of the above statements is/are correct?

Answer: [B] Only 2

First statement is incorrect because both Lithium-ion battery as well as Ni-Cd is secondary batteries. A primary battery is a portable voltaic cell that is not rechargeable. A secondary battery is a portable voltaic cell that is rechargeable.

This question is a part of GKToday's Integrated IAS General Studies Module