How to repair or how to change the charging circuit of our Xiaomi Redmi 3. When to change the charging connector? When the cable does not fit the connector, the charging pin does not indicate charge or the battery does not rise in percentage, the connector does not recognize the data cable. In this video tutorial we show you how to replace the charge of your Xiaomi Redmi 3. Before repairing the charging connector, you must visually inspect the input pins. Due to rust, or some damaged track, the entire charge of the phone may stop working.