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.
Pike Researchâs estimate from late 2011 for a finished and installed EV battery pack placed the cost at $752 per kilowatt-hourâbut by this year it would fall by 5 percent, and drop 10 percent more by 2013. Bloomberg New Energy Finance indicated that the current price is $689 per kWh. So, the McKinsey number for today's pack is another indication that $600 is in the right range. Using $600 per kWh, the LEAF's 24-kWh battery pack would cost Nissan $14,400.