Quick Charge 3.0 USB power analyzer
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 |
44 | 65 | 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. This device to measure the Quick Charge 2.0 performance.