Formula E 2015-16: Championship race 'incredibly close'

Updated 2143 GMT (0543 HKT) February 6, 2016
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Buenos Aires hosted round four of the 2015-16 Formula E World Championship. Zak Mauger/Formula E
Green, clean and fast: Formula E is the world's first all-electric racing series. Sam Bloxham/Formula E
The #BAePrix is the fourth race of 11 in the 2015/2016 championship and runs through the streets of the Argentinian capital. ALEJANDRO PAGNI/AFP/AFP/Getty Images
CNN SuperCharged presenter Nicki Shields out on an electric bike in Buenos Aires before Saturday's race. The city has embraced electric transport in recent years. Stefanie Blendis/CNN
In our new show SuperCharged, Shields will be giving you an insight not only into race weekends but the electric technologies that are becoming more prominent on the streets of towns and cities all over the world. The first show airs on Saturday February 13. For show times visit CNN's motorsport page Stef Blendis/CNN
Nearly all Formula E races take place in major city centers including London, Moscow and this year Paris for the first time. The 2.407-kilometer track in Buenos Aires is encased in protective fencing -- a huge undertaking for the city and race organizers. Stef Blendis/CNN
Can the pace-setting Renault e.Dams team, seen here during the 2015 race, dominate? Sam Bloxham/Sam Bloxham
Team Aguri's Portuguese driver Antonio Felix da Costa gets passionate with the trophy after winning the inaugural race in 2015. ALEJANDRO PAGNI/AFP/AFP/Getty Images
Defending world champion Nelson Piquet Jr finished third in Buenos Aires and enjoyed this champagne moment on the podium. "It's one of my favorite races because Buenos Aires has so much vibrancy," adds CNN presenter Nicki Shields. ALEJANDRO PAGNI/AFP/AFP/Getty Images
Brazilian Lucas di Grassi is in the heat of this season's title race, just one point behind Renault e.Dams rival Sebastien Buemi. Will things hot up in Argentina? Here's hoping! ALEJANDRO PAGNI/AFP/AFP/Getty Images
Buemi (pictured) won the previous round in Uruguay -- his second victory of the 2015-16 season. Getty Images
Formula E's cars run on rechargeable batteries with a maximum power of 200 kilowatts. Formula One's hybrid racers rely on a turbocharged 1.6-litre V6 engine and an Energy Recovery System (ERS). Adam Warner/Formula E
Formula E aims to bring fans closer to the sport. The Fan Boost vote means the audience can even give their favorite driver a 100kJ surge of power during the race. Frenchman Jean-Eric Vergne, pictured, proved popular with the fans in Uruguay. Adam Warner