DC power supply activated
When the battery power is very low, the charger cannot be charged; adjust the voltage of the DC power supply to about 3.7V, then connect the positive and negative poles of the DC power supply to the battery contacts, and directly charge the battery to achieve the effect of activating the battery; Note that the voltage must not be too high.
Mainly refers to the battery with protective plate (lithium battery, iron lithium battery, etc.), when it is discharged for a long time, the voltage is too low and it will be over-discharged protection. At this time, it needs to be activated by an external DC power supply and a higher voltage.
