Thinking of picking up the budget Tesla Model S? Think again: the electric automaker just announced that it won't be sending its 40 kWh battery pack option into production, citing a lack of customer demand. Customers who opted for the lower range configuration will still get a car, of course, but it will be a 60 kWh machine with software restrictions on range. It sounds like a raw deal, but Tesla promises customers that the artificially limited Model S will reap unexpected benefits from the battery swap -- that is, improved acceleration and a higher top speed. All of the company's 60 kWh cars will be built with Supercharger hardware, too. Finally, the company announced that it surpassed its first quarter sales goal, having delivered 4,750 Model S vehicles on its planned 4,500. This gives it a head start on its year-end goal of delivering 20,000 cars in 2013 and presumably secures the Q1 profits it promised shareholders back in February. Curious onlookers and Department of Energy collectors can find the details after the break.