McLaren are saying that by the 2018 Formula E season they will have a battery with twice the energy density of today's batteries and have signed on to supply batteries for the 5th season that will allow cars to go the full race distance.
McLaren to supply new Formula E battery - Formula E
Is there something actually behind this or more PR than technology?
McLaren to supply new Formula E battery - Formula E
Is there something actually behind this or more PR than technology?