Final answer:
Electricity stored in batteries is a typical stored energy used to power today’s vehicles. While the energy density of batteries is lower compared to gasoline, electric drive can be more efficient at delivering stored energy into mechanical energy.
Step-by-step explanation:
The typical stored energy used to power today’s vehicles is electricity stored in batteries. In electric and hybrid vehicles, the batteries harness the energy of spontaneous redox reactions.
These batteries have energy densities that are much smaller than those of gasoline, but electric drive can be more efficient at delivering stored energy into mechanical energy compared to the thermal conversion of fossil energy in large vehicles. Overall, the energy density of batteries is lower than that of gasoline, but advancements in battery technology and increased efficiency are continuing to improve electric vehicles.