Which battery type is 50-60% lighter than lead-acid batteries?

Which battery type is 50-60% lighter than lead-acid batteries?

• A. Ni-Cad
• B. Lead Acid
• C. Lithium-Ion
• D. Silver-Zinc

Answer: (A)

Weight differences come from energy density: how much energy you get per kilogram. Lead-acid batteries carry less energy per kilogram than nickel-cadmium, so for the same amount of stored energy, a Ni-Cd battery weighs noticeably less—roughly half as much in common specs, which corresponds to about 50–60% lighter. This higher energy density lets Ni-Cd packs deliver adequate power while reducing weight compared with lead-acid. Other chemistries either have different trade-offs or don’t match that specific weight-for-energy claim in typical data, so in the context of this question the nickel-cadmium option best fits the 50–60% lighter comparison.

Weight differences come from energy density: how much energy you get per kilogram. Lead-acid batteries carry less energy per kilogram than nickel-cadmium, so for the same amount of stored energy, a Ni-Cd battery weighs noticeably less—roughly half as much in common specs, which corresponds to about 50–60% lighter. This higher energy density lets Ni-Cd packs deliver adequate power while reducing weight compared with lead-acid. Other chemistries either have different trade-offs or don’t match that specific weight-for-energy claim in typical data, so in the context of this question the nickel-cadmium option best fits the 50–60% lighter comparison.