1 . Energy efficient. Electric motors convert 75% of the chemical energy from the batteries to power the      wheels-internal combustion engines (ICEs) only convert 20% of the energy stored in gasoline.

2 . Environmentally friendly. EVs emit no tailpipe pollutants, although the power plant producing the      electricity may emit them. Electricity from nuclear-, hydro-, solar-, or wind-powered plants     causes no air pollutants.

3 . Reduce energy dependence. Electricity is a domestic energy source.

4 . Performance benefits. Electric motors provide quiet, smooth operation and stronger acceleration and     require less maintenance than ICEs.

The Down Side: Batteries

EVs face significant battery-related challenges:

1 . EV recharging Station Driving range. Most EVs can only go 150 miles (or less)     before     recharging- gasoline vehicles can go over 300 miles before refueling.

2 . Recharge time. Fully recharging the battery pack can take  4 to 8 hours.

3 . Battery cost: The large battery packs are expensive and usually must be replaced one or more     times.

4 . Bulk & weight: Battery packs are heavy and take up considerable
vehicle space.

Researchers are working on improved battery technologies to increase driving
range and decrease recharging time, replacement frequency, weight, and cost.
These factors will ultimately determine the future of EVs.