Doubling the capacity of the current hybrid battery would get you a total of 2.2 kWh, which would maybe be enough to get you down the street. In order to squeeze 220 km of range from a 550 lb motorcycle, Harley needs to put a 15.6 kWh pack in the Livewire. Scale up a bit with weight and size, and you need 24 kWh in a Fiat 500e just to get you 160 km. The Maverick doesn't qualify as a particularly special or rare chassis to justify the cost of conversion, so you're better off waiting for Ford to produce one since they can afford to put in a 40/60/80/whatever kWh battery for much cheaper than you can.