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.
Each battery pack cost Nissan an estimated US$18,000 at the car's launch in May 2010. By 2015, the battery costs were around US$300/kWh, giving a battery cost of around US$5,500 for batteries not within the eight year warranty period. Nissan reported that in Europe only 3 of 35,000 leaf batteries had failed.