Quick Charge 3.0 USB power analyzer measurements

Upon plugging USB power from the Aukey Quick Charge 3.0 charger into the Quick Charge 2.0 capable Blackberry Priv, a small fraction of a second is spent at 5 V input, while the Quick Charge 2.0 rate is negotiated. Starting from 20% charge, in less than 2 hours the Priv is completely charged. Battery charge of 20% → 60% is achieved in 40 minutes.

The Blackberry Priv seems to want to always have an input of 9 volts, even when the battery is at 100%, and even if the charger is power cycled at 100% battery charge, the Priv likes 9 volt Quick Charge 2.0 input all the time.

Quick Charge 2.0 voltage/current vs time

The table below is approximate, with the display off. At 100% charge, the rate bounced between 0.02-0.2 amps as the phone pings Wifi, checks for email, etc. Most of the time, it was at about 50 mA.

time [minutes]Charge %Input [Volts]Current [Amps]
 0 20 9.24 1.65
 24 45 9.18 0.92
 4465 9.18 0.93
 100 95 9.16 0.55
 120 100 9.13 0.05, peak 0.2

The Keweisi USB power analyzer is an interesting device available for less than $10. It claims to be capable of measuring 3-9 volts at up to 3 amps. I used this device to measure the Quick Charge 2.0 performance of the Blackberry Priv. I was pleased with this device, but was unable to test > 10 volts since I don’t have a Quick Charge 3.0 device or a Quick Charge 2.0 device demanding more than 9 volts.