Quick Charge

Common card · No. 246825

Quick Charge (QC) is a proprietary battery charging protocol developed by Qualcomm, used for managing power delivered over USB, mainly by communicating to the power supply and negotiating a voltage. Quick Charge is used by certain chargers with devices that run on Qualcomm system-on-chip (SoCs), such as some phones. Both the device and charger must support QC for QC charging to happen; alternatively, if either fail to implement QC, then regular USB charging happens instead. QC charges batteries in devices faster than standard USB allows by increasing the output voltage supplied by the USB charger, while adopting techniques to prevent the battery damage caused by uncontrolled fast charging and regulating the incoming voltage internally. Many chargers that implement Quick Charge 2.0 and later are wall adaptors, but it is implemented on some in-car chargers, and some power banks use it to both receive and deliver charge. Quick Charge is also used by other manufacturers' proprietary rapid...

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