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.
June 2014: Nissan Leaf replacement battery packs are priced at $5,500 with around $500 for installation. That is just $250 per kWh. CNN Money November 2013: According to PWC, electric car batteries cost a little more than $600 a kilowatt-hour.f you buy lead acid batteries, they may be cheaper up front, but you have to replace then 4 times or more as often as Li-Ion type batteries, and they do not hold as much charge. EV battery prices have fallen more than forecast and are approaching $300 per kWh.