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My Laptop "Quick Charge"s my phone over USB C. How does this work?

Xanthe_2871
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When I plug my Motorola Z2 into my laptop with a USB A to C cable it charges slowly. Not even 2A. When I plug it in C to C it charges rapidly, the same way it does when I use a Qualcomm Quick Charge charger. But it's instant. When I use a USB wall charger there's a handshake and it takes a few seconds. But when I use C to C on my laptop the phone instantly charges at the full rate. Is the C to C the only reason there isn't a multi-second handshake? Would a C to C wall adapter do the same? Do all USB C Windows laptops support the Qualcomm Quick Charge standard? Is it something in a driver? In the BIOS? Will anyone here actually answer all of these questions? Am I just way to curious about the minutiae of how my laptop charges my phone?

 

Any info would be greatly appreciated! 

Yes, it's 2871 as in the year 2871. I traveled all this way, back in time, just to help you. And you thought your mama lied when she said you were special-_-

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15 minutes ago, Xanthe_2871 said:

When I plug my Motorola Z2 into my laptop with a USB A to C cable it charges slowly. Not even 2A. When I plug it in C to C it charges rapidly, the same way it does when I use a Qualcomm Quick Charge charger. But it's instant. When I use a USB wall charger there's a handshake and it takes a few seconds. But when I use C to C on my laptop the phone instantly charges at the full rate. Is the C to C the only reason there isn't a multi-second handshake? Would a C to C wall adapter do the same? Do all USB C Windows laptops support the Qualcomm Quick Charge standard? Is it something in a driver? In the BIOS? Will anyone here actually answer all of these questions? Am I just way to curious about the minutiae of how my laptop charges my phone?

 

Any info would be greatly appreciated! 

Your laptop's A port might not have USB Power Delivery spec'd properly. It isn't uncommon tbh. The C port on your laptop (given it has to be able to accept such things) probably has at LEAST USB PD properly implemented, if not Qualcomm QC. USB PD supports up to 100W at 20V, and supports multiple other fast stages your phone likely accepts (15W/27W charging).

 

The reason it takes longer is because your computer is a much faster power circuitry device than normal wallchargers (or the phone itself, even). For obvious reasons really. a c to c wall adapter might be faster, but it is unlikely to match the speed of a proper handshake between two much higher power devices.

 

AFAIK many if not most laptops don't actually support Qualcomm QC, but at least laptops from Apple, Google, Dell, HP, and Microsoft (likely many more) support USB PD on their C ports.

 

We'd have to know your exact laptop to be able to tell you for sure.

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51 minutes ago, Curufinwe_wins said:

Your laptop's A port might not have USB Power Delivery spec'd properly. It isn't uncommon tbh. The C port on your laptop (given it has to be able to accept such things) probably has at LEAST USB PD properly implemented, if not Qualcomm QC. USB PD supports up to 100W at 20V, and supports multiple other fast stages your phone likely accepts (15W/27W charging).

 

The reason it takes longer is because your computer is a much faster power circuitry device than normal wallchargers (or the phone itself, even). For obvious reasons really. a c to c wall adapter might be faster, but it is unlikely to match the speed of a proper handshake between two much higher power devices.

 

AFAIK many if not most laptops don't actually support Qualcomm QC, but at least laptops from Apple, Google, Dell, HP, and Microsoft (likely many more) support USB PD on their C ports.

 

We'd have to know your exact laptop to be able to tell you for sure.

I see, Motorola calls Qualcomm Quick Charge "TurboPower". Is it possible my laptop is using USB PD and the phone either considers that "TurboPower" as well, or is just saying TurboPower connected because it doesn't have a toast notification for USB PD so it uses the next closest thing?

 

My laptop is a Lenovo Flex 5, sorry I should have included that.

Yes, it's 2871 as in the year 2871. I traveled all this way, back in time, just to help you. And you thought your mama lied when she said you were special-_-

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