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.
Nissan said the battery will lose capacity gradually over time but it expects a lifespan of over 10 years under normal use. The 2011/12 Leaf's battery was initially guaranteed by Nissan for eight years or 160,000 km (100,000 miles) (see Warranty sub-section below under United States for limitations).