05-15-2017 06:15 PM
31 12
tools
  1. Talderon's Avatar
    Hey, I just got my S8+ over the weekend and am at work where I have a Laptop/Docking Station with a USB-C port (not USB to USB-C, a USB-C to USB-C) and every time I plug in my phone, it starts with Fast Charging and then just goes to a SLOW SLOW charge.

    No matter what I set in the USB settings it will not keep it on Fast Charge mode. I have installed the latest drivers from Sansung, but nothing is helping. Any ideas?

    Laptop: Latitude 7480
    Docking Station: Dell Thunderbolt Dock - TB16
    OS: Windows 10 - Fully updated (non preview build)

    Thanks all!

    edit:Adding additional information

    First off, thanks for the answers and suggestions. Here is some additional information that you asked for.

    • Laptop has USB-3.1
    • I am not using the original Cable as I am using a USB-C to USB-C cable tat did not come with the phone.
    • With the Wall Charger, it does Fast Charge
    • USB Settings is set to Charge Only
    • I will have to go to my truck to get the original cable, and will test with that
    05-11-2017 03:54 PM
  2. Aquila's Avatar
    Is the USB C port on the laptop USB 2, USB 3 or USB 3.1?
    05-11-2017 04:02 PM
  3. Aquila's Avatar
    Also, are you using the cable that came with the phone or another one?
    05-11-2017 04:04 PM
  4. T22rmh's Avatar
    If you're not using the original charger and cable then fast charging might not work.
    05-11-2017 04:08 PM
  5. Golfdriver97's Avatar
    Does it fast charge without the docking station?
    05-11-2017 04:17 PM
  6. Aquila's Avatar
    Also, is the device set to transfer files or just to charge?
    05-11-2017 04:37 PM
  7. tengtengvn's Avatar
    Check the port. It has to support Power Delivery for fast charge to work.
    05-11-2017 04:41 PM
  8. Jason Fournier1's Avatar
    I don't think you can fast charge from a computer. Needs to be a charger that supports QC 2.0 or Fast Charge
    05-11-2017 05:20 PM
  9. Talderon's Avatar
    This is a real bummer. Friends here have the Google Pixel phones and they have no issues with the fast charging, but with Samsung, it seems like it was an after thought to put USB-C in there and then cripple it.

    I watch my friends phone connected to my laptop (USB-C) charge from 30% to 80% in minutes.
    05-11-2017 05:46 PM
  10. Almeuit's Avatar
    This is a real bummer. Friends here have the Google Pixel phones and they have no issues with the fast charging, but with Samsung, it seems like it was an after thought to put USB-C in there and then cripple it.

    I watch my friends phone connected to my laptop (USB-C) charge from 30% to 80% in minutes.
    Yeah not sure why their Pixel works but your phone doesn't. If I plug into the Pixel XL charger via brick and USB c cable it fast charges.
    05-11-2017 06:09 PM
  11. Aquila's Avatar
    Must be PD compatibility?
    05-11-2017 06:46 PM
  12. amyf27's Avatar
    Not sure what the issue is if the other phones do fast charge. Are those phones using the same cord? Originally thought the laptop power output wasn't strong enough

    My s8plus fast charges but I usually have it plugged into a wall end adapter to either a power strip or my car with a car charger adapter. Sometimes usb-c and sometimes micro usb w/usb-c adapter
    05-12-2017 08:59 PM
  13. osubass1's Avatar
    Do you know how many amps or miliamps that USB - C port on you laptop puts out?
    05-12-2017 10:33 PM
  14. theelite1x87's Avatar
    I believe the pixel XL and S8 use different fast charge standards. S8 is Qualcomm quick charge 2.0. pixel XL uses the USB c power delivery standards. Your laptop dock probably only supports USB c PD, and not Qualcomm quick charge. This is the issue
    Talderon likes this.
    05-12-2017 10:47 PM
  15. Aquila's Avatar
    I believe the pixel XL and S8 use different fast charge standards. S8 is Qualcomm quick charge 2.0. pixel XL uses the USB c power delivery standards. Your laptop dock probably only supports USB c PD, and not Qualcomm quick charge. This is the issue
    If the laptop supported PD it'd be fast charging the phone. It's most likely a USB 2 port with a type c slot and so putting out less wattage than QC 2 wants.
    05-12-2017 11:36 PM
  16. GizmoEV's Avatar
    When using the dedicated USB-C charger that came with my Microsoft Lumia 950XL the S8+ charges at the same rate as charging from a 2.4A USB charging brick. The Lumia 950XL charges at the full 3A of the dedicated USB-C charger so Samsung definitely didn't build in the higher current rate of USB-C. :-(
    05-13-2017 01:28 PM
  17. Golfdriver97's Avatar
    A simple test for USB 2 or 3 should be to push a very large file and use a stopwatch. USB 3 will finish the file in about a third of the time as 2.
    05-13-2017 03:30 PM
  18. anon(7901790)'s Avatar
    Check the specs on your laptop and check the power output of your USB ports.

    Not all devices that have USB-C ports implement full USB-C specs.

    P.S.

    Here are the USB specs for a Latitude 7480

    USB
    • Two USB 3.0
    • One USB 3.0 with PowerShare
    • One DisplayPort over USB Type-C (optional Thunderbolt 3)

    Your USB-C is for audio/video. You're not going to get fast charging from any of your USB ports.
    05-14-2017 09:48 AM
  19. Jaycemiskel's Avatar
    Yeah not sure why their Pixel works but your phone doesn't. If I plug into the Pixel XL charger via brick and USB c cable it fast charges.
    Does it still charge quickly with the screen on too? Thinking about switching to USB PD instead of adaptive fast charging for this reason.
    05-14-2017 11:18 AM
  20. Almeuit's Avatar
    Does it still charge quickly with the screen on too? Thinking about switching to USB PD instead of adaptive fast charging for this reason.
    Not sure haven't tried.
    05-14-2017 11:22 AM
  21. jeffmd's Avatar
    The S8 still carries the 2.0 limitation of no fast charge while the screen is on.
    05-14-2017 11:33 AM
  22. jeffmd's Avatar
    When using the dedicated USB-C charger that came with my Microsoft Lumia 950XL the S8+ charges at the same rate as charging from a 2.4A USB charging brick. The Lumia 950XL charges at the full 3A of the dedicated USB-C charger so Samsung definitely didn't build in the higher current rate of USB-C. :-(
    The Lumia 950XL doesn't use Qualcomms quick charge which increases voltages up to 9v and 12v at 2.4 amps, it just uses the standard USB-C power configuration for 3 amps. 2 different technologies.
    05-14-2017 11:41 AM
  23. Jaycemiskel's Avatar
    The S8 still carries the 2.0 limitation of no fast charge while the screen is on.
    That's if you're using quick charge 2.0. If you're using USB PD, that limitation, supposedly, is not in place. There's another thread where a guy measured the power input and it stayed constant with a USB PD charger whereas it was cut almost in half with AFC or QC 2.0. I was just hoping that I could get another confirmation of that before buying more chargers. He was going to do more extensive testing, but then he just disappeared.
    05-14-2017 11:43 AM
  24. jeffmd's Avatar
    The s8 has no official support for usb pd and only a few thread claims that it does, with as many claims that it doesn't.
    05-14-2017 11:55 AM
  25. Jaycemiskel's Avatar
    The s8 has no official support for usb pd and only a few thread claims that it does, with as many claims that it doesn't.
    https://gtrusted.com/review/the-sams...-fast-charging

    Yeah, no official, but it will fast charge on it. My device even says fast charging when hooked up to a computer that supports USB PD by USB C. That computer definitely doesn't support Qualcomm quick charge. I'm not questioning whether it supports it, just want to know if it'll fast charge even with the screen on. Maybe I'll buy something to measure it so I can see.
    05-14-2017 12:55 PM
31 12

Similar Threads

  1. battery not charging and going down if i use it
    By AC Question in forum LG K10
    Replies: 2
    Last Post: 09-26-2017, 05:11 PM
  2. Replies: 1
    Last Post: 05-11-2017, 05:34 PM
  3. Why won't my gd adapter charge my phone
    By AC Question in forum Ask a Question
    Replies: 1
    Last Post: 05-11-2017, 01:54 PM
  4. Samsung Galaxy S4 won't charge Replacement same problem
    By AC Question in forum Ask a Question
    Replies: 1
    Last Post: 05-11-2017, 12:54 PM
  5. Replies: 0
    Last Post: 05-11-2017, 10:16 AM
LINK TO POST COPIED TO CLIPBOARD