Gary Anderson on how KERS works

BBC Sport's Gary Anderson visits the Mercedes factory in Brackley to see how KERS, short for Kinetic Energy Recovery Systems, 'harvest' energy to allow Formula 1 drivers their 'boost button' which provides them with an extra 80bhp for 6.67s per lap.

Drivers operate their Kers button to aid overtaking and defence during races.

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BBC Sport
Formula 1