GTrusted
The LeEco Le 1s is one of many phones that have adopted Qualcomm's Quick Charge 2.0 and the first to support Qualcomm Quick Charge over the USB Type-C interface. We decided to test its capabilities with various Quick Charge 2.0 and 3.0 enabled power supplies to see how it performed.
To see how the LeEco Le 1s charges with its own Qualcomm Quick Charge 2.0 charger, we took some oscilloscope screenshots showing the voltage and current in blue and green respectively. This charger supports 24 watts through 12 volts @ 2 amps and 9 volts @ 2.7 amps as well as 13.5 watts (5 volts @ 2.7 amps), to charge the phone.
Here we see that the LeEco Le 1s is charging at 12 volts and eventually pulling between 1.5 amps of current. Note that the current charging level isn't stable and keeps on switching between 1 amps and 1.5 amps. The units in the y-axis are on the right hand side of each graph.
Voltage Screenshot:
Current Screenshot:
You can see activity on the D+ and D- lines to facilitate the power negotiation (note the D+/D- screenshots below are not time synchronized with the voltage/current screenshots above).
Next we look at the LeEco Le 1s communicating with the LeEco Le Max 2 charger that supports Quick Charge 3.0. This charger supports up to 24 watts through a 3.6 to 8 voltage range @ 3 amps and 24 watts through a fixed 12 volts @ 2 amps, to charge the phone.
The oscilloscope screenshots below show the current and voltages in blue and green respectively that were supplied to the LeEco Le 1s. The voltage starts at zero, rises to 5V, then is negotiated to 12V. The current goes from 0 to 0.5A to 1A.
Voltage Screenshot:
Current Screenshot:
The next two images show the protocol negotiation signals on D+ and D- in green and yellow respectively (note the D+/D- screenshots below are not time synchronized with the voltage/current screenshots above).
Lastly, we charged the LeEco Le 1s with the LG G5's charger, which supports Qualcomm Quick Charge 3.0 and provides 16 watts (9 volts @ 1.8 amps) and 9 watts (5 volts @ 1.8 amps).
The oscilloscope screenshots below show the LeEco Le 1s pulling 9 volts at about 1.1 amps.
Voltage Screenshot:
Current Screenshot:
Again we can see Quick Charge protocol negotiation going on the D+ and D- lines.
The Qualcomm Quick Charge 2.0 based LeEco Le 1s supports the Qualcomm Quick Charge 3.0 chargers tested above. We were happy to see backwards compatibility for Qualcomm Quick Charge technology being maintained.
We then purposely drained the battery of the LeEco Le 1s to 25% and plugged in the LeEco Le Max 2's Qualcomm Quick Charge 3.0 charger with the following results.
Voltage Screenshot:
Current Screenshot:
We can see an interesting charge battery pattern where the current ramps up in small steps to 1 amps while voltage makes large jumps from 4 volts to 6 volts to 9 volts.
