Tesla Just Unveiled Shocking Updates to Its Model S and Model X Cars

Tesla unveiled updated versions of its Model S and Model X vehicles on Wednesday.
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Tesla (TSLA) - Get Report unveiled updated versions of its Model S and Model X vehicles on Wednesday. Chief among them are stronger batteries that can propel the Model S from 0-60 miles an hour in 2.5 seconds. The only cars that accelerate at a faster pace include the LaFerrari and the Porsche 918 Spyder, which were only produced in small quantities and for a limited time. The Model X goes from zero to 60 miles an hour in 2.9 seconds. Tesla shares dipped slightly into negative territory on Wednesday. TheStreet's Scott Gamm reports from Wall Street.