The currently used batteries in electric cars are usually the lead-acid type, which are heavy and bulky. A lead-acid battery pack in a typical electric car weighs about 1000 pounds or more; it also occupies a large space as about 50 batteries each of size 6" x 8" x 6" are required for a single car (Brain, 2006). They are also expensive as a typical lead-acid battery pack for an electric car costs about $2,000. Moreover, batteries get discharged quickly and give only about a 50-mile range to a car, after which the battery-pack has to be re-charged. The re-charging process is also time-consuming and it takes between 4 to 10 hours for full charge, depending on the battery technology and the charger (Ibid). Such batteries also have a relatively short life and have to be replaced in about three to four years.

Recent development in battery technology has now...
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