Rumours of an electrified 500 began circulating last month, and new reports this week suggest the concept will offer a driving range of over 240 kilometres from a single charge.
According to British website AutoExpress, the electric 500 will bear a battery pack with over 5000 cells, drawing additional energy from a KERS-like regenerative braking system.
The electric 500 will reportedly take 10 hours to gain a full charge from a regular home power supply, while dedicated charging stations will accomplish the task in half the time.
As with many conventional vehicles converted to electric power, drag-reducing aerodynamic updates to the 500's exterior are expected.
The report claims that while the battery park will increase the 500's kerb weight, a 0-96km/h (0-60mph) sprint should be achievable in around 10 seconds. A top speed of 145km/h is expected.
It remains to be seen whether there is any truth to these reports, but with the Detroit show less than a week away, time will tell soon enough.
In a recent presentation to the Italian Government, Fiat CEO Sergio Marchionne revealed that the Fiat 500 will be offered with a 900cc turbo-charged two-cylinder petrol engine from next year.
The engine is expected to be offered as the entry-level or ultra-efficient eco-friendly version of the Fiat 500, along with the Panda and Punto.