The reference voltage is around 44.5V. This value is high for fast and sufficient power, but it is easy to make the battery lose water. The current will not come under the charging stage, and the battery will be deformed by heat. This value is not conducive to the rapid and sufficient power of the battery, which is conducive to the conversion to the turbulent stage. Although this value is not as strict as the first value, it should not be too high.