The Vodafone McLaren Mercedes F1 team scored the first win for a KERS-equipped car at the 2009 Hungarian Grand Prix.
According to the McLaren synopsis, driver Lewis Hamilton benefited from KERS to charge down to the first turn alongside Kimi Raikkonen and Sebastian Vettel. He out-braked Mark Webber to briefly hold second before losing traction at the exit and ceding the place back into Turn Two. Nonetheless, he kept up the pressure to pass the Australian around the outside of Turn Two five laps later. He immediately started to close the gap to leader Fernando Alonso, and took the lead on lap 12 when the Spaniard was the first to pit.
The KERS unit used by McLaren features custom lithium-ion power cells developed by A123Systems that offer more than 20,000 W/kg, according to Ric Fulop, one of A123Systems’s co-founders.