Quick Charge USB voltage / current measurements
Note: USB-PD dominates the market now, this was just some old measurements of Quick Charge 2.0.
Upon plugging USB power from a Quick Charge 3.0 charger into a Quick Charge 2.0 capable device, 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 device is completely charged. Phone battery charge of 20% → 60% is achieved in 40 minutes.
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 periodically 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 |