After adding in this 'guestimate' for the inefficiencies of producing and transporting gasoline- they conveniently overlook the 'problems' of obtaining Lithium.I hope this information helps answer what you're looking for.
- They say the average gas vehicle data comes from a car with a fuel economy of 27 mpg. They then add a factor of 1.25 to account for emissions from the production and transportation of gasoline.
Yes, let's add in 25% for the guestimate on gasoline, because Lithium is so easy to get out of the ground and to process into a usable state for batteries, that that environmental impact shouldn't be considered; and its transportation costs are free too.