Electronics > Beginners

Question on batteries

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AtLarge:
Can someone explain to me what the significance of the white wire is on this battery?  As best I can find it is some type of "detect" line but I'd like to know more or how I can use it for testing purposes.  I know there is charging circuitry on a PCB before the cells but, wouldn't detection be measured right off the positive terminal when voltage is applied there?

tooki:
Either a data line to a battery IC or a temperature sensor.

Jwillis:
tooki is correct. Its a communication data bus for the BMS (Battery Management System). This type should only be charged by a smart charger.

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