Item Type: Battery Charge Boost Module Material: PCB RISET: Charging Current: 180K 0.5A, 90K 1A, 75K 1.2A, 60K 1.5A RVSET: 2S Charging Voltage: 1K 8.1V, 68K 8.2V, 120K 8.3V, NC 8.4V 3S Charging Voltage: 1K 12.3V, 68K 12.4V, 120K 12.5V, NC 12.6V Functions: 1. Support QC fast charging 2. 15W synchronous switch boost charging 3. Increase charging efficiency by 94% 4. Can be set to charge 2 or 3 series of lithium batteries 5. 2 series balanced charging 6. Adjustable charging current 7. Input overvoltage and undervoltage protection 8. Adjustable charging timeout protection 9. Output overcurrent, overvoltage and short circuit protection Introduction: This module is applicable to 2S or 3S 3.7V lithium battery. Through short circuit setting, the default is 2 strings. When using 2 strings, the module can use its own battery equalization function, which is very practical. Type C port and welding line can be used for input. When the Type C port is connected to the fast charging power supply, the charging voltage is automatically adjusted to improve efficiency. If the input voltage of the welding wire input is less than the battery voltage, the module can only work in the boost state.