Lithium battery charge and discharge only 400-600 periods, specially changed goods, but 800 periods. The nickel-metal hydride rechargeable battery can attain more than seven-hundred periods, some very good quality goods as much as 1200 periods charge and discharge, these kinds of a comparison, the nickel-metal hydride batteries are living more time than lithium batteries. Furthermore, the value of nickel-metal hydride batteries is way lower compared to lithium batteries. Additionally, strictly speaking, lithium batteries possess the exact memory result, but its memory result is quite lower, generally negligible.