[farisjarrah]

Switching out batteries in Formula E has been problematic up until this point from a technological point of view, so much so that in Formula E they simply have 2 cars and when the drivers pit they hop out of the first car and into the second car. Batteries are extremely heavy and need to be protected so that in the event of an accident they don't explode or kill the driver. Thus far the battery has been more or less part of the chassis. Its not clear that battery technology is advanced enough to provide the energy density required to propel the cars at racing speeds while also being portable enough to be swapped out mid-race.

[qkls]

They don't swap cars anymore. But the races are shorter than F1 races.