This graph shows the trend in battery performance since 1970.
Battery capacity is a key factor in the success of electric vehicles. The Renault-Nissan Alliance has opted for lithium-ion technology. Used by mass-retail electronic products since the 1980s, lithium-ion (or Li-ion) batteries have several advantages. They have an excellent weight/energy ratio, do not suffer from the memory effect, and have minimum self-discharge rates.