1) If your battery does not have a protection board, the three wires are: the red wire is the positive pole, the black wire is the negative pole, and the other color wires are the middle poles of the battery. These three wires are connected to the main board of your product, and the middle pole is Give you the product motherboard to monitor the voltage of the lithium battery.

If your battery has a protection board, the three wires are: the red wire is the positive pole of the battery, the black wire is the negative pole of the battery, and the wires of other colors are the NTC (thermistor) of the protection board. The thermistor is for the main board to detect the lithium battery. temperature or to distinguish the type of battery

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