Originally Posted by
Wise Old Owl
The quick charge mode Leo speaks of is a smart mode - In the first few seconds of connecting a charger the phone decides thru a resistive bridge network hidden at the manufactures included charger. I have posted the diagram here in the past. The phone looks to see the data wires shorted, the correct volts/amps for power charging, and resistance. If the phone doesn't see the three things all correct it flags the user with a beep and message and selects the slower 6-8 hour charge instead of the two.
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