In magnetic resonance, the time for 63% of transverse relaxation to occur; the value is a function of magnetic field strength and the chemical environment of the hydrogen nucleus; for protons in fat and in water, in a 1.5T magnet, about 60 milliseconds and 250 milliseconds, respectively.he effective T2 relaxation time, shorter than T2 because of magnetic field inhomogeneities; the observed time constant of free induction decay.
Including conversion and generation losses, a single full Leaf charge might take 25 kWh (19 kWh usable into the battery). Factor in expected usage to get an average kWh per month value.
Given that estimates in 2009 and 2010 of the first pack costs in the Chevy Volt and Nissan Leaf ranged from $600 to $1,200 per kwh, that's a lot of progress in only five years. And as is often the case, we suspect Tesla may be more optimistic about the fall in costs it will see than is the rest of the auto industry.