LEAF's 24 kWh lithium-ion (Li-ion) battery is comprised of 48 compact modules of four cells each (192 cellstotal), which allows a high degree of packaging flexibility.
This optimised arrangement of a total of 864 cells has benefits not only in terms of best use of the installation space, but also in terms of performance.
Solar charge times are determined by the total area and efficiency of the solar cells -- the Spark uses high-efficiency monocristalline cells which will charge an iPad from about 10 hours of sunshine.
He has managed to derive neural stem cells from 16 of these patients, out of a total of 22, and believes that success depends on which region of the brain is affected.