While engaged in electric power cut-off when charging circuits have two pieces one 14.4v battery charger is not charging current to 500mA of charge vıltaj 4AH, suitable for 7AH battery. Other circuits are also doing the same job but... Electronics Projects, Backup Power Supply Circuit Auto Charger Li-Polymer Li-ion Battery "battery charger circuit, power electronic projects, " Date 2019/08/03