Continuous and automatic charging and discharging for lithium-ion batteries

This paper introduces another methodology of charging lithium-ion batteries for portable devices such as laptops and tablets. The presented low-cost charger circuit which is developed to be easily designed follows the constant-current and constant-voltage scheme, CC-CV. Also, this charger circuit will continuously and automatically charge and discharge the battery in order to protect it from over-charging and over-discharging and so maintain its life cycle.