The second season of Formula E kicks off in October, and there's one key difference for the championship's sophomore year: custom batteries and motors. The teams are now able to experiment with the car's powertrain, which includes the e-motor, inverter, gearbox and cooling system. That means the cars will perform differently on the track, adding a little extra strategy and excitement to the proceedings. What we didn't expect, however, is the sound of the cars to change – watch the video below for a glimpse at how they'll be screeching off the starting grid. Is it me, or do they all sound like confused felines?

This article by Nick Summers originally ran on Engadget, the definitive guide to this connected life.

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