The maximum charging current/output current is 1A, but you can change the current by changing the value of the R1 resistor. The charging current is automatically adjusted according to the output capacity of the input power supply. Constant current/constant voltage with thermal regulation function can maximize the charging rate without the risk of overheating. Perform pre- adjustments to deeply discharged batteries and minimize heat dissipation during the initial charging phase. After removing the input power supply voltage, the charging module will automatically enter a low-power sleep mode. With C/10 charging termination, automatic charging, battery overvoltage and other functions. Lithium battery charger for solar system, input voltage 4.4-6V, charging output voltage 4.2V.