LM317 made ​​with lithium ion, lithium polymer charger circuit both current and voltage at 8.2V and 12.6V 4.2V adjustable output that can give you 2 … 3 rechargeable batteries connected in series. Shir input voltage 12v dc circuit Current... Electronics Projects, Lithium polymer Lithium-ion Charger Circuit LM317 Current Limited "battery charger circuit, power electronic projects, " Date 2019/08/03