thstone - as far as battery regen goes, I imagine they'd use regenerative braking:
Formula 1® - The Official F1® Website - Understanding F1 Racing - Energy Recovery Systems (ERS)
Because the high-torque power demand typically follows a braking event, the power is available on corner exit.
A similar system is used on many road-going hybrids & electric cars.
Full disclosure - I HATE traditional hybrids & electrics (and their pretentious owners).
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