Maya Electric, a subsidiary of the battery maker Electrovaya, will be launching its Maya 300 electric vehicle on Tuesday. The car is an urban vehicle with a limited range (about 60 miles) and speed (25 or 35 miles per hour, depending on regulations regarding low speed vehicles). The company says that what distinguishes the car from other low-speed electric vehicles for sale is its use of Electrovaya's polymer-electrolyte batteries, which the company says store 60 percent more energy than other lithium ion batteries.

I spoke with Sankar Das Gupta earlier this year about the car and the batteries that power it.