This is the separate parts, use it with 100balance smart BMS or smart active balancer. Minimum NTC temperature < heating start temperature (can be set by the PC host), and there is a charger; then heating will be turned on Minimum NTC temperature > Heating shutdown temperature (can be set by the PC host), turn off heating for charging Judgment of abnormal status: heating is turned on for 15 minutes, but the temperature does not rise by 2 degrees. Heating is abnormal. Exist heating . After 15 minutes, judge whether to turn on heating again. Heating is turned on for 60 minutes, but the temperature does not rise by 5 degrees. Heating is abnormal. Exit heating. 15 Check again after a few minutes whether to turn on heating. We provide 1 year product warranty and 24/7 online perfessional service for your inquiry,please feel free to contact us. 100BALANCE Accessories Parts for Smart active balance BMS