Lithium-ion rechargeable battery, charging in a constant voltage constant current system. Charger No-load voltage is a deep discharge battery check if below 2.9V per cell 0.1ltmA after charging at a certain time than 3.0V per cell stop Check voltage... Electronics Projects, LM317 Li-Ion Batteries Fast Charger Circuit "battery charger circuit, power electronic projects, " Date 2019/08/02