Qualcomm are known for their widely adopted Snapdragon processors. Boasting the most-supported fast-charging standard, their Quick Charge (QC) standard can be found in hundreds of devices.
But what is Quick Charge? How does it work? What versions are there?
Device that supports Qualcomm Quick Charge
Charger that supports Qualcomm Quick Charge
Note: Although Qualcomm Quick Charge versions are backward compatible, if a later QC version charger or device is used with an older QC version charger or device, the device will charge at the slower rate.
How does it work?
When you connect a QC charger to a device that supports the QC charging standard, the charger initially supplies the device with the standard 5 Volts, traditionally found in USB devices.
It speaks with the device
After being plugged in, the charger communicates with the QC device, asking for the device’s maximum supported charging voltage. The QC device responds by communicating this information to the QC charger.
It dynamically adjusts to suit the device
Having received the charging specifications from the device, the charger begins to dynamically adjust its voltage output, supplying the best charging voltage for the device to charge to 50% power as fast as possible. Qualcomm Quick Charge (Version 3.0 onward) can support all voltages between 3.6-20V.
What are the different versions of Qualcomm Quick
There are currently six versions of the Quick Charge, each are backwards compatible (see table). The later versions also support USB Power Delivery (USB-PD: Another fast-charging standard). Unfortunately there aren't any clear guidelines published on Qualcomm's website, so the table below should be taken with a pinch of salt, as the information was gathered from multiple sources.
Claimed Charging Rate
Qualcomm Quick Charge 1.0 (2013)
Charge a smartphone up to 50% in 60 minutes
Auto Input Current Limit
Auto Power Source Detection
Not listed by Qualcomm
Qualcomm Quick Charge 2.0 (2014)
Class A: 5V/9V/12V
Class B: 5V/9V/12V/20V
Up to 75% faster than standard charging
High Voltage Dedicated Charging Port (HVDCP)
Dual Charge (Optional)
Samsung Galaxy S6-S10[+] Range
HTC One M8/M9
Sony Xperia Z2-Z5 Range
Qualcomm Quick Charge 3.0 (2016)
3.6V - 22V
2.6A or 4.6A
Charge a smartphone up to 80% in 35 minutes
Dual Charge+ (Optional)
Intelligent Negotiation for Optimum Voltage 1.0 & 2.0 (INOV)
If your device is compatible with Qualcomm Quick Charge, be sure to check the version of the device and any other devices you may own. Purchase chargers supporting the later versions of Quick Charge where possible, as this will allow you to take advantage of the fastest charging rate supported by your current devices, and any future QC devices you may own.