https://blog.gongquiz.com/2021/04/08/%eb%b2%a4%ec%b8%a0-c220-cdi-%ec%8a%a4%eb%a7%88%ed%8a%b8%ed%82%a4-%eb%b0%b0%ed%84%b0%eb%a6%acbattery-%ec%89%bd%ea%b2%8c-%ea%b5%90%ed%99%98change%eb%b0%a9%eb%b2%95-%d1%8b/