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How the LG G6 Phone Charges with Huawei's 24W USB-C Power Adapter

Qualcomm
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The LG G6 phone supports USB Power Delivery for fast charging so let's see how well it works with the 24W USB-C Power Adapter, a USB Power Delivery charger that came with the Huawei MateBook PC. The LG G6 battery is depleted when we start charging it with the 24W USB-C Power Adapter over the USB Type-C connector.

From the USB Power Delivery negotiations, we can see that initially the 24W USB-C Power Adapter repeatedly declares its source capabilities of 10 watts (5 volts @ 2 amps), 18 watts (9 volts @ 2 amps), and 24 watts (12 volts @ 2 amps) without any response from the LG G6 which has zero charge in its battery.

After some time, the LG G6 finally requests 18 watts (9 volts @ 2 amps) from the 24W USB-C Power Adapter and is accepted by the charger.

Looking at the power graph, we can see that during the first 10 seconds, the LG G6 trickle charges at about 7.5 watts (5 volts @ 1.5 amps) when at 0% battery from the 24W USB-C Power Adapter

After 12 seconds, we can see that the LG G6 is pulling around 15.6 watts (9.2 volts @ 1.7 amps).

After another 12 seconds, the power drawn drops slightly to around 12.9 watts (9.2 volts @ 1.4 amps).

Both phone and charger support Qualcomm Quick Charge technology as well as USB Power Delivery. However, it appears that Quick Charge may be used initially during the trickle charge phase and even after the USB Power Delivery contract has been set.

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