Which charges faster USB C or USB 3 .0? - Pixel C Q&A, Help & Troubleshooting

I just bought my first Google pixel tablet with a USB C charging point. Is it faster to charge USB C to USB C?
Or is USB 3.0 2 USB C the same speed?
Thanks

I know with my lg v20 if I use my USB c pd charger with it. It charges faster than my 3.0 USB A to USB c charger. So I would guess same holds true with the pixel c.
Sent from my LG-H910 using Tapatalk

USB-C and USB 3.0 are two completely separate things. USB-C is merely a connector type. The default protocol for USB-C is USB 3.1, but if anything in the connection is incompatible with 3.1 then it will reduce down to whatever the lowest is. For instance using a USB 3.0 cable on a 3.1 connection results in 3.0 speeds/power. Likewise, if you use a tablet/phone whose physical port is USB 2.0 with a 3.0 cable it will still only go at 2.0 speeds.
What really matters here is your power source. The Pixel C supports USB Power Delivery for fast charging. The included charger is not PD-capable and will charge at 15W ([email protected]). The Google 60W USB Type C charger (included with the 2015 Chromebook Pixel) will charge the Pixel C at 24W ([email protected]) Another thing to keep in mind when considering chargers is that Qualcomm's Quick Charge isn't the same as what the Pixel C uses and likely will always default to 5V/2.4A charging so make sure you use a PD-capable charger if you want to get the fastest charging speeds.

tkoreaper said:
USB-C and USB 3.0 are two completely separate things. USB-C is merely a connector type. The default protocol for USB-C is USB 3.1, but if anything in the connection is incompatible with 3.1 then it will reduce down to whatever the lowest is. For instance using a USB 3.0 cable on a 3.1 connection results in 3.0 speeds/power. Likewise, if you use a tablet/phone whose physical port is USB 2.0 with a 3.0 cable it will still only go at 2.0 speeds.
What really matters here is your power source. The Pixel C supports USB Power Delivery for fast charging. The included charger is not PD-capable and will charge at 15W ([email protected]). The Google 60W USB Type C charger (included with the 2015 Chromebook Pixel) will charge the Pixel C at 24W ([email protected]) Another thing to keep in mind when considering chargers is that Qualcomm's Quick Charge isn't the same as what the Pixel C uses and likely will always default to 5V/2.4A charging so make sure you use a PD-capable charger if you want to get the fastest charging speeds.
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That's very informative. How quickly does the pixel charge when at 12V/2A?

All very useful information. Thank you.
I have a feeling that fast charges can eventually cause damage to a battery or at least reduce its life expectancy.
I don't know why but I have the impression that slower charging – if one isn't in a hurry, such as overnight will eventually give longer battery life – especially interesting in a unit which doesn't have a user rechargeable battery.
Got any comments about this?

I would suggest this reading: http://www.fpvforme.com/charging-lipo-batteries/

Just make 100% positive you're buying a good USB C Power Delivery compatible charger+cable, if not you risk damaging your Pixel C.
Reference this spreadsheet https://docs.google.com/spreadsheets/d/1vnpEXfo2HCGADdd9G2x9dMDWqENiY2kgBJUu29f_TX8/pubhtml

Related

Questions re fast charging N1 from USB ports

According to Wikipedia, there are two charging currents for Type C USB ports - 1.5A(default) and 3A(optional). Has anyone been able to charge the Nokia N1 at 3A from another Type C USB port? Did it charge at 3A automatically or did you have to make an adjustment to make it charge at a higher current?
Some of the new computers have Type A 3.1 USB ports that are compliant with the power delivery 2.0 specs and can negotiate and deliver currents higher than 900mA. Has anyone been able to charge the N1 from a Type A USB port at a current higher than 900mA? Do you know if the USB port was PD 2.0 specs or a so-called "fast charging" port that attempts to deliver higher current without negotiation.
The USB port on my Nokia N1 does not have any USB icon on it to indicate that it complies with USB specs. I know that data speeds are limited to USB 2.0, but has anyone noticed whether there are any other Type C USB port capabilities that the Nokia N1 is lacking?
p.s. I'm assuming the N1 does not possibly support any of the QuickCharge variants because it has an Atom CPU rather than a Qualcomm CPU.

USB type C and Quick Charge 3.0

This is interesting. Basically this guy is saying USB-C doesn't support proprietary charging above 5 volts which is why Google didn't use Quick Charge for the Nexus 6P.
Maybe this is also why Samsung didn't use USB-C because they wanted to safely use Quick Charge?
http://phandroid.com/2016/04/21/lg-g5-htc-10-usb-type-c/
This is going to be posted all over and its basically nonsense. The current QC 2.0 over micro usb are also using 9-12volts. And micro usb also only supports 5v. So. It's no different then it's ever been.
Get a QC3.0 compatible charger/cable and be done.
regalpimpin said:
This is going to be posted all over and its basically nonsense. The current QC 2.0 over micro usb are also using 9-12volts. And micro usb also only supports 5v. So. It's no different then it's ever been.
Get a QC3.0 compatible charger/cable and be done.
Click to expand...
Click to collapse
Quoted for truth.
Quickcharge checks before sending down higher voltages. It's fully backwards compatible even if it's not part of the USB specs. There is no additional danger from what you had before.
I follow
https://plus.google.com/+BensonLeung/posts
for his tested products and I think everyone will be fine.
Qualcomm has a list as well
https://www.qualcomm.com/documents/q...ge-device-list
chazall1 said:
I follow
https://plus.google.com/+BensonLeung/posts
for his tested products and I think everyone will be fine.
Qualcomm has a list as well
https://www.qualcomm.com/documents/q...ge-device-list
Click to expand...
Click to collapse
Qualcomm link isn't working.
jsaxon2 said:
Qualcomm link isn't working.
Click to expand...
Click to collapse
https://www.qualcomm.com/documents/quick-charge-device-list
This is total BS!!
I have the HTC 10 in my hands, it is quick charging with no issues.
Also, take the Apple Macbook as an example, the laptop uses an USB-C port to charge, it inputs 14.5V with 2A.
If the USB-C meets the USB-Power-Delivery standard, it can transfer up to 100W of power. Don't believe the BS article.
Edit: It seems that Qualcomm uses their own implementation, but still it is transferring voltage over 5 volts
Is the article supposed to say that not all USB-C cables can support it? Maybe the cheap ones can't?
Didn't Amazon just yank a bunch of cheaply made USB-C cables from their marketplace?
Sent from my SM-G935T using Tapatalk
Here's my take. I have always been under the impression the device dictates the watts and volts not the charger. The charger has a range it will draw power, and the phone tells the charger how much it needs. QC standard is UP TO and is not absolute. So if the device tells the charger I want 15W/5V that's what it'll get.
Sent from my SM-G935T using Tapatalk
I've been trying to research and I have come up with a conclusion. This is only my opinion, but I have based it off of hours of research. Please feel free to correct me if I am wrong.
Is QC QuickCharge 3.0 charger going to hurt my phone or anyy other devices I may plug into it?
Best I can figure is no. QC 3.0 chargers are designed to only fast charge if it is connected to a QC 3.0 device. Before it starts fast charging, it does a negotiation withh the device to verify if it supports QC 3.0. "Also, since Quick Charge is compatible and interoperable, a certified adapter can be used with a non-Quick Charge device, though the fast charging benefits of Quick Charge will not be available. " : Source
Can my HTC 10 be charged qith a non QC 3.0 charger?
The simple answer is yes. If you use one of the many non-QC 3.0 chargers that you have laying around, it will charge your phone just fine. This is as long as you use a compliant cable with the 56k ohm resistor. More on that next.
Does it matter which USB cable I use?
This one is tricky. I do not have an HTC 10 yet, but I have heard that it comes with a USB 2.0 Type A to USB 3.0 Type C cable. I can't find the source now, but it was in the Mega Thread. If this is true, than you should be able to use any cable this spec or better. By better I mean a USB 3.0 Type A to USB 3.1 Type 3 cable should work fine. The most important part is that the USB cable MUST have a 56k ohm resister. There have been some cheap cables using a 10k ohm resister that could cause problems. These problems could result in the port on the device or the charger getting damaged.
Will the HTC 10 work with a USB-PD charger?
Well first, USB-PD stands for USB-Power Delivery. This is the new USB fast charging standard set by the USB gods. This technology allows devices to receive more power and thus would allow a phone to charge more quickly. This is NOT the same as QC 3.0. QC 3.0 is a proprietary charging system and only available on certain Qualcomm powered devices. So can the HTC 10 use USB-PD? My guess is no but I could be wrong. According to GSMArena, the HTC 10 has aa USB 3.1 port. USB 3.1 supports USB-PD for quick charging. This would lead me to beleive that the HTC 10 supports both methods of fast charging. Unfortunately, I have been unable to find anywhere on HTC's site that specifies what the USB port actually is. My guess is that it is USB 3.1 compatible but not USB 3.1 compliant. by USB 3.1 compatible I am saying it will do everything that a compliant port will do except the USB-PD charging. We actually know that the port is not USB 3.1 compliant as the USB standard does not allow the method of fast charging that QC 3.0 utilizes.
I hope this helps to clear some things up. Once again I am no expert, but this is the way it appears to work as far as I can tell. If there is anything that I have wrong, please let us know and I can change it.
Thanks
jsaxon2 said:
I've been trying to research and I have come up with a conclusion. This is only my opinion, but I have based it off of hours of research. Please feel free to correct me if I am wrong.
Is QC QuickCharge 3.0 charger going to hurt my phone or anyy other devices I may plug into it?
Best I can figure is no. QC 3.0 chargers are designed to only fast charge if it is connected to a QC 3.0 device. Before it starts fast charging, it does a negotiation withh the device to verify if it supports QC 3.0. "Also, since Quick Charge is compatible and interoperable, a certified adapter can be used with a non-Quick Charge device, though the fast charging benefits of Quick Charge will not be available. " : Source
Can my HTC 10 be charged qith a non QC 3.0 charger?
The simple answer is yes. If you use one of the many non-QC 3.0 chargers that you have laying around, it will charge your phone just fine. This is as long as you use a compliant cable with the 56k ohm resistor. More on that next.
Does it matter which USB cable I use?
This one is tricky. I do not have an HTC 10 yet, but I have heard that it comes with a USB 2.0 Type A to USB 3.0 Type C cable. I can't find the source now, but it was in the Mega Thread. If this is true, than you should be able to use any cable this spec or better. By better I mean a USB 3.0 Type A to USB 3.1 Type 3 cable should work fine. The most important part is that the USB cable MUST have a 56k ohm resister. There have been some cheap cables using a 10k ohm resister that could cause problems. These problems could result in the port on the device or the charger getting damaged.
Will the HTC 10 work with a USB-PD charger?
Well first, USB-PD stands for USB-Power Delivery. This is the new USB fast charging standard set by the USB gods. This technology allows devices to receive more power and thus would allow a phone to charge more quickly. This is NOT the same as QC 3.0. QC 3.0 is a proprietary charging system and only available on certain Qualcomm powered devices. So can the HTC 10 use USB-PD? My guess is no but I could be wrong. According to GSMArena, the HTC 10 has aa USB 3.1 port. USB 3.1 supports USB-PD for quick charging. This would lead me to beleive that the HTC 10 supports both methods of fast charging. Unfortunately, I have been unable to find anywhere on HTC's site that specifies what the USB port actually is. My guess is that it is USB 3.1 compatible but not USB 3.1 compliant. by USB 3.1 compatible I am saying it will do everything that a compliant port will do except the USB-PD charging. We actually know that the port is not USB 3.1 compliant as the USB standard does not allow the method of fast charging that QC 3.0 utilizes.
I hope this helps to clear some things up. Once again I am no expert, but this is the way it appears to work as far as I can tell. If there is anything that I have wrong, please let us know and I can change it.
Thanks
Click to expand...
Click to collapse
Yes it is compliant.... This is why USB 2.0 devices were able to have quick charging. The type C port is no different.
http://www.anandtech.com/show/8539/...ard-device-class-v10-specifications-finalized
Version 3.1 now supports 5 V, 12 V, and 20 V on the pins to allow the higher power output without excessive current, but even the current has been increased to a maximum of 5 A which is much higher than before.
The HTC 10 does support 3.1 as their tech page says it support USB 3.1 gen 1
http://www.htc.com/us/go/buy-htc-10/#unlocked
Buttons Keys and Connection Ports
3.5 mm stereo audio jack, USB 3.1 Gen 1, Type-C, Capacitive keys
---------- Post added at 03:28 PM ---------- Previous post was at 03:19 PM ----------
I wanted to add if you are part of the Elevate program you can see the white papers and it shows it is USB 3.1 Gen 1 type-c
If someone wants to host the file I will gladly upload it.
Tidbits said:
Yes it is compliant.... This is why USB 2.0 devices were able to have quick charging. The type C port is no different.
http://www.anandtech.com/show/8539/...ard-device-class-v10-specifications-finalized
Version 3.1 now supports 5 V, 12 V, and 20 V on the pins to allow the higher power output without excessive current, but even the current has been increased to a maximum of 5 A which is much higher than before.
The HTC 10 does support 3.1 as their tech page says it support USB 3.1 gen 1
http://www.htc.com/us/go/buy-htc-10/#unlocked
Buttons Keys and Connection Ports
3.5 mm stereo audio jack, USB 3.1 Gen 1, Type-C, Capacitive keys
Click to expand...
Click to collapse
Your kinda missing the point. The the HTC 10 is NOT compliant. It goes against the USB-C spec, "These, and any charger you see that supports QC3.0 over USB Type-C, might be QC3.0 certified but they're not following the USB-C spec." Source. If you are not following the spec, you are not compliant. You can be compatible without being compliant. Anyway, I don't care if you want to call it compliant or not. What I am getting at is that it most likely does not support the USB Power Delivery for fast charge. And if it does not support USB-PD, than it is not a USB 3.1 compliant port. USB 3.1 standard includes USB-PD Source. So the HTC whitepapers say it is a USB 3.1 port. That is great. If it does USB-PD fast charging, than that would be awesome.
jsaxon2 said:
Your kinda missing the point. The the HTC 10 is NOT compliant. It goes against the USB-C spec, "These, and any charger you see that supports QC3.0 over USB Type-C, might be QC3.0 certified but they're not following the USB-C spec." Source. If you are not following the spec, you are not compliant. You can be compatible without being compliant. Anyway, I don't care if you want to call it compliant or not. What I am getting at is that it most likely does not support the USB Power Delivery for fast charge. And if it does not support USB-PD, than it is not a USB 3.1 compliant port. USB 3.1 standard includes USB-PD Source. So the HTC whitepapers say it is a USB 3.1 port. That is great. If it does USB-PD fast charging, than that would be awesome.
Click to expand...
Click to collapse
Benson assumes it isn't compliant because
1. He doesn't have the device.
2. He can't find what USB port is being used
So since he can't find this information that he can't recommend something is on the basis that he doesn't want to approve something because he doesn't know. I bet if he saw the information I just showed and he sees the white paper he'll change what he said.
Why would it not be compliant when USB 2.0 devices can charge using the exact same voltage yet a 3.1 port can't? Think about it for a minute. It would be cheaper if they were not compliant to NOT use, and not give a QC 3.0 charger... Much like Google did with the 5X and 6P probably to save on costs.
Tidbits said:
Benson assumes it isn't compliant because
1. He doesn't have the device.
2. He can't find what USB port is being used
So since he can't find this information that he can't recommend something is on the basis that he doesn't want to approve something because he doesn't know. I bet if he saw the information I just showed and he sees the white paper he'll change what he said.
Why would it not be compliant when USB 2.0 devices can charge using the exact same voltage yet a 3.1 port can't? Think about it for a minute. It would be cheaper if they were not compliant to NOT use, and not give a QC 3.0 charger... Much like Google did with the 5X and 6P probably to save on costs.
Click to expand...
Click to collapse
Okay, I wait for him to get the device then. You still can't be compliant and break the rules though. You can be compatible though. As for the 5x and 6p, they support the USB-PD fast charging. This kept google with the USB standard. HTC chose to go with the QC 3.0 proprietary solution most likely because it works better. QC 3.0 only has to work with select QC devices and therefore can be tailored to exactly what they need. USB-PD will have to work across multiple device types from multiple manufacturers. This leaves room for inefficiencies. That would be my opinion.
jsaxon2 said:
Okay, I wait for him to get the device then. You still can't be compliant and break the rules though. You can be compatible though. As for the 5x and 6p, they support the USB-PD fast charging. This kept google with the USB standard. HTC chose to go with the QC 3.0 proprietary solution most likely because it works better. QC 3.0 only has to work with select QC devices and therefore can be tailored to exactly what they need. USB-PD will have to work across multiple device types from multiple manufacturers. This leaves room for inefficiencies. That would be my opinion.
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That shows to me it doesn't support USB-PD 2.0 which supports up to 20V to the pins
http://www.anandtech.com/show/8539/u...ions-finalized
When USB was first introduced, the thought was that it would be primarily a data interface, with a limited amount of power delivery which was generally used to power the electronics of certain devices. The initial specification for USB only had provisions for 0.75 watts of power – 150 mA at 5 V. USB 2.0 bumped that to 500 mA, or 2.5 watts, and USB 3.0 specified 900 mA at 5 V, or 4.5 watts. All of these specifications allow for power as well as data transmission at the same time. In addition, there was also a Battery Charging specification which allows up to 1.5 A at 5 V for a maximum of 7.5 watts of power but with no data transmission available. The jump from 7.5 watts to 100 watts of the new specification is a huge increase, and one that cannot be done with just an amperage increase on the system as was done in the previous versions of USB. Version 3.1 now supports 5 V, 12 V, and 20 V on the pins to allow the higher power output without excessive current, but even the current has been increased to a maximum of 5 A which is much higher than before.
That right there makes it possible for QC 3.0 to happy while staying PD 2.0 compliant.
Tidbits said:
That shows to me it doesn't support USB-PD 2.0 which supports up to 20V to the pins
http://www.anandtech.com/show/8539/u...ions-finalized
When USB was first introduced, the thought was that it would be primarily a data interface, with a limited amount of power delivery which was generally used to power the electronics of certain devices. The initial specification for USB only had provisions for 0.75 watts of power â?? 150 mA at 5 V. USB 2.0 bumped that to 500 mA, or 2.5 watts, and USB 3.0 specified 900 mA at 5 V, or 4.5 watts. All of these specifications allow for power as well as data transmission at the same time. In addition, there was also a Battery Charging specification which allows up to 1.5 A at 5 V for a maximum of 7.5 watts of power but with no data transmission available. The jump from 7.5 watts to 100 watts of the new specification is a huge increase, and one that cannot be done with just an amperage increase on the system as was done in the previous versions of USB. Version 3.1 now supports 5 V, 12 V, and 20 V on the pins to allow the higher power output without excessive current, but even the current has been increased to a maximum of 5 A which is much higher than before.
That right there makes it possible for QC 3.0 to happy while staying PD 2.0 compliant.
Click to expand...
Click to collapse
Everything you posted is usb-pd specs. I agree. The difference is that qc 3.0 uses the data pins as well where usb-pd does not. They are two different approaches to achieving a common goal. While QC 3.0 does not apply more power than the spec allows, is does supply the power in a way that goes against the spec.
jsaxon2 said:
Everything you posted is usb-pd specs. I agree. The difference is that qc 3.0 uses the data pins as well where usb-pd does not. They are two different approaches to achieving a common goal. While QC 3.0 does not apply more power than the spec allows, is does supply the power in a way that goes against the spec.
Click to expand...
Click to collapse
Do you have the papers showing this? I haven't seen anything that says it goes through the data channels.
Either way the fact that PD2.0 rates 20V debunks the cable or connector can only handle 5V arguments.
I'm not sure if it was said but USB 3.1 =/= USB 3.1 Gen 1.
Especially in response to "The HTC 10 does support 3.1 as their tech page says it support USB 3.1 gen 1"
USB 3.1 with it's 10Gbit/s speed along other specs, features etc. was originally called USB 3.1.
USB 3.0 with it's 5Gbit/s speed along other specs, features etc. was originally called USB 3.0.
USB 3.0 =/= USB 3.1
Got that?
USB 3.0 > USB 3.1 Gen 1
USB 3.1 > USB 3.1 Gen 2
Why? Because retards.
Also marketing wankers. "Looky looky, our product has USB 3.1 Gen 1 which means it's better than USB 3.0."
Same story happened with LTE and 4G. Carriers/ISP's begged/forced the 3GPP to allow them to call LTE as 4G when LTE-Advanced is what 4G is.. LTE is more like 3.9G
And if I'm not mistaken, you Americans also had 3G HSPA+ disguised as 4G when it's actually 3.75G? And when LTE rolled out they just called it LTE.
tl;dr? HTC 10 has a USB 3.1 Gen 1 port or in other words USB 3.0.
lagittaja said:
I'm not sure if it was said but USB 3.1 =/= USB 3.1 Gen 1.
Especially in response to "The HTC 10 does support 3.1 as their tech page says it support USB 3.1 gen 1"
USB 3.1 with it's 10Gbit/s speed along other specs, features etc. was originally called USB 3.1.
USB 3.0 with it's 5Gbit/s speed along other specs, features etc. was originally called USB 3.0.
USB 3.0 =/= USB 3.1
Got that?
USB 3.0 > USB 3.1 Gen 1
USB 3.1 > USB 3.1 Gen 2
Why? Because retards.
Also marketing wankers. "Looky looky, our product has USB 3.1 Gen 1 which means it's better than USB 3.0."
Same story happened with LTE and 4G. Carriers/ISP's begged/forced the 3GPP to allow them to call LTE as 4G when LTE-Advanced is what 4G is.. LTE is more like 3.9G
And if I'm not mistaken, you Americans also had 3G HSPA+ disguised as 4G when it's actually 3.75G? And when LTE rolled out they just called it LTE.
tl;dr? HTC 10 has a USB 3.1 Gen 1 port or in other words USB 3.0.
Click to expand...
Click to collapse
USB 3.1 gen 1 only works with type C connectors on eqch end to get those speeds. That's why you don't see USB 3.0 type C cables or USB 3.1 A to C cables.
My laptop makes that distinction as well. All my ports are 3.0, but my type C ports are USB 3.1 gen 2.
Even Monoprice for example. All their C to C are 3.1, but as soon as one is a different connector they are all 3.0.
http://www.monoprice.com/pages/usb_31_type_c
Of course this is my understanding and what my laptop maker explained to me.
Sent from my SM-G935T using Tapatalk
Tidbits said:
USB 3.1 gen 1 only works with type C connectors on eqch end to get those speeds. That's why you don't see USB 3.0 type C cables or USB 3.1 A to C cables.
My laptop makes that distinction as well. All my ports are 3.0, but my type C ports are USB 3.1 gen 2.
Even Monoprice for example. All their C to C are 3.1, but as soon as one is a different connector they are all 3.0.
http://www.monoprice.com/pages/usb_31_type_c
Of course this is my understanding and what my laptop maker explained to me.
Sent from my SM-G935T using Tapatalk
Click to expand...
Click to collapse
The USB spec etcetera is a deep rabbit hole and the renaming of USB 3.0 didn't help things at all.
You don't need type C-C cable for USB 3.1 Gen 1. USB 3.1 Gen 1 is what we used to know as USB 3.0. You can have USB 3.0 or USB 3.1 Gen 1 with USB A-A or A-microB (the weird 3.0 micro) or A-B or A-C or C-C or whatever the variation you can think of.
The reason you don't see USB 3.0 C-C cables is because chicken and the egg. The original USB 3.0 spec was released before the type C..
Type C was developed at the same time as the now finalized USB 3.1 spec, which absorbed the original USB 3.0 spec as USB 3.1 Gen 1 and the USB 3.1 we knew before is now known as USB 3.1 Gen 2, and was (C spec) released alongside the USB 3.1 spec which it supplements.
No USB 3.1 A-C cables? Ahem. http://www.belkin.com/us/p/P-F2CU029/
Also, just please try and forget the USB x.x with the type C.
Type C is type C. It is a physical connector, it's a cable/connector standard.
Just like mini B or micro B or B or A for that matter..
USB x.x is a technology standard.
USB-PD is a technology standard.
They are not the same thing.
They are not dependent on each other.
In other words, you can have type C with USB 2.0 if you so wish, look at the Nexus 5X and 6P..
http://www.usb.org/developers/usbty...ge_Product_and_Packaging_Guidelines_FINAL.pdf
Please note the following:
USB Type-C™ is not USB 3.1
The USB Type-C™ cable and connector specification is a supplement to the USB 3.1 specification, however USB Type-C™ is not USB 3.1.
These terms are not interchangeable.​
USB Type-C™ is not USB Power Delivery
USB Power Delivery is a protocol/hardware solution that increases USB power capabilities up to 100W.
These terms are not interchangeable.​
If a product features USB Type-C™ it does not necessarily support USB Power Delivery and/or USB 3.1
Device manufacturers can choose to support USB Power Delivery and/or USB 3.1 performance but it is not required for USB Type-C™ products​
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Click to collapse

[Review/Comparison] Choetech USB Car chargers QC3 USB (T002) & USB C (c0051)

Review/Comparison between Choetech USB Car chargers QC3 USB (Tc002) & USB C (c0051)
(Note this is tested on HTC 10 with a choetech USB C cable)
USB QC 3 charger (Model tc002)
This is a nice little charger, small form and built well. It has a little led in the middle to let you know it has power/is charging. It also comes with usb c cable which is a nice addition.
It has 2 ports, one with a blue strip around it to let you know it’s the “main” QC 3 port. This port gives off 9.1v with 0.83a. The phone recognised this as QC3 and displayed the “charging rapidly” sign.
The 2nd port has no strip around it. It gives off 5v and 1.9a, so will charge slightly slower but still for an in charge charger will charge most phones well.
USB C QC 3 charger (Model c0051)
This is a nice little charger like the above, very similar build wise the only difference being the ports themselves. Please note no cable was provided with this charger. The led also changes from blue to green when charging.
It has 2 ports, 1 usb c and 1 normal USB (USB A). The normal usb port also looks reversible which is a nice added feature. The usb C port requires a USB C to USB C cable.
The normal USB port gives off 8.8v and 1.5a. The phone did recognize this as QC3 and displayed the “charging rapidly” sign.
The usb c port I was unable to read due to not having the right connector to read volts and amps, so I used an inbuilt amp to read the charging speed (Ampere). This read as 1800mA which as comparison is around the same as the official HTC charger that came with my HTC 10. The phone however did not display the “charging rapidly” sign
Conclusions
Both are very good chargers and both available at a reasonable price. If I were to pick one I would pick the 1st USB QC 3 charger (tc002) simply because I feel the double usb a ports give you more options when charging

Will using a USB-C to USB-A cable remove the quick charging?

Title
No
Sent from my Nexus 5X using Tapatalk
You need to use quality charger with 3.0A for that
a good/proper usb-c to usb-a cable is supposed to have a built in resistor to keep the device from pulling too much current through the older usb-a plug, which ofc wasn't designed with the capabilities of usb-c in mind.
therefore you should not be able to charge as fast with said cables, otherwise it wouldn't be too unlikely for your device or charger to get seriously damaged.
Broken303 said:
a good/proper usb-c to usb-a cable is supposed to have a built in resistor to keep the device from pulling too much current
Click to expand...
Click to collapse
To be more precise, the resistor doesn't keep the device from pulling too much current, it tells the device it is connected to a legacy cable and it should limit to .5, .9, or 1.5A. The device can still choose to pull more current if it has alternate means of figuring out the capabilities of the power source. It won't be using facilities within the USB C spec, but it will still work fine.
My bedside combo of a 2.4amp charging brick, anker powerline 10ft micro usb cable, and anker micro usb to usb c adapter gives me quick charging. The cable and adapter also allow data transfer and adb from my macbook pro.
sedracer said:
My bedside combo of a 2.4amp charging brick, anker powerline 10ft micro usb cable, and anker micro usb to usb c adapter gives me quick charging. The cable and adapter also allow data transfer and adb from my macbook pro.
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In my experience 5x says "Charging rapidly" around 1.6A. Some of the legacy USB A -> USB C cables (either direct or through micro-usb adapter) can get around 1.6A and 5x will display "Charging rapidly" but this might not be the same rate as the stock USB C native charger with which the device can pull 2.6A for the lower battery ranges like 0-40% before the phone slows down to around 1.8A (and even slower later on in the cycle)
sfhub said:
In my experience 5x says "Charging rapidly" around 1.6A. Some of the legacy USB A -> USB C cables (either direct or through micro-usb adapter) can get around 1.6A and 5x will display "Charging rapidly" but this might not be the same rate as the stock USB C native charger with which the device can pull 2.6A for the lower battery ranges like 0-40% before the phone slows down to around 1.8A (and even slower later on in the cycle)
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Discovered this after returning my 5x, picking up a 6p, and installing ampere. Still functional as a bedside charger but thanks for the help tho.

Charging Pixel XL by using Laptop is extremely slow

I have got unlimited mobile internet and actually need to connect my mobile to laptop for USB tethering as have limited internet for WiFi tethering. I previously had used many phones but they were charging at good speed when connected with USB ports on laptops but PIxel XL is very slow.
"Charging slowly" = below 1A (at 5V),
"Charging" means between 1A and 1.5A,
"Charging rapidly" means more than 1.5A
I am using Anker USB C (male) to Micro USB Adapter (female) to connect it with usb ports of Laptop. I have usb 2.0 and 3.0 ports on laptop but it dont make any difference and charging is still slow. Is there any way to make it charge faster or even at medium speed between 1A and 1.5A ?
Thank you
Rajaasim1980 said:
I have got unlimited mobile internet and actually need to connect my mobile to laptop for USB tethering as have limited internet for WiFi tethering. I previously had used many phones but they were charging at good speed when connected with USB ports on laptops but PIxel XL is very slow.
"Charging slowly" = below 1A (at 5V),
"Charging" means between 1A and 1.5A,
"Charging rapidly" means more than 1.5A
I am using Anker USB C (male) to Micro USB Adapter (female) to connect it with usb ports of Laptop. I have usb 2.0 and 3.0 ports on laptop but it dont make any difference and charging is still slow. Is there any way to make it charge faster or even at medium speed between 1A and 1.5A ?
Thank you
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Click to collapse
I believe that 2.0 is only able to output 500 mAh and 3.0 is 900 mAh.
All the non-charging ports on my PC are 500mAh for the USB 2.0 ports.
It's how it's been with every phone I ever had.
Industry standard for a non charging USB port AFAIK.
Thanks guys for your response
So it dont matter what USB cable you use and it will still be slow charging? Its second time i am using phones that use type c charging.
My previous Samsung phones had normal usb ports and they were charging fine with laptops and charging was not this slow . Is it type c thing that make it slow when you use adaptor to covert type c into micro USB?
Rajaasim1980 said:
Thanks guys for your response
So it dont matter what USB cable you use and it will still be slow charging? Its second time i am using phones that use type c charging.
My previous Samsung phones had normal usb ports and they were charging fine with laptops and charging was not this slow . Is it type c thing that make it slow when you use adaptor to covert type c into micro USB?
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Click to collapse
It's a placebo. All phones charge at 500mah on a laptop. The Samsungs probably didn't have such big batteries or had better battery life so you felt you were charging your phone less.
You would be better off carrying a quick charging battery pack.
USB 2.0 runs at 500mA at 5v, giving 2.5W
USB 3.0 runs at 900mA, giving 4.5
To put this in perspective, our oem and Google store sold chargers are 18-22 watts.
Very few pc ports (unless specified) will give you decent charging speed. My ECS motherboard has pin outs for quick charging at around 15watts.
Look for some usb hubs with power delivery.

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