The charge of lithium iron phosphate battery pack is recommended to use CCCV charging mode, that is, constant current before constant voltage. Constant current 0.3C is recommended. The recommended constant voltage is 3.65. that is, 0.3C current charge during the constant current process. When the battery voltage reaches 3.65V, 3.65V voltage constant voltage charge is adopted. When you charge with a balanced voltage power supply, you also need to look at the charging current, it is recommended not to charge with too high a voltage, adjust the voltage to ensure that the charging current is below 0.5C, which is good for the battery.