I am a retired telephone network switching maintenance technical officer, with a long held interest in diagnosing and fixing problems in most types of electro-mechanical and electronic equipment.
I am a retired telephone network switching maintenance technical officer, with a long held interest in diagnosing and fixing problems in most types of electro-mechanical and electronic equipment.
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The 3rd wire from a battery is usually connected to a thermistor attached to the battery which signals the temperature (resistance value changes with temp) to the battery management circuit in the motherboard.
Charging will be halted to if it got too hot before being fully charged, which may create problems e.g. a fire
If leaving the 3rd wire disconnected, the battery should not be left unsupervised whilst it is charging
Hi @captainsnowball ,
FYI
voilà French exclamation - meaning “There it is!” or “There you are!”
The “red thing” in Step 3 is most probably an IR filter, to filter out visible light to improve IR operation