1. bbmjack's Avatar
    I bought usb 3.0 is it worth it or no
    I charge my phone with it I can't tell if it is faster than 2.0?

    Posted via Android Central App
    08-11-2014 09:55 AM
  2. TexasS5's Avatar
    Id say YES, mine charges really quickly, alot faster than my iPhone 5 did.
    08-11-2014 10:00 AM
  3. jmagid51's Avatar
    My phone charges much faster with USB 3.0. it's almost twice the speed of my old S4. If it doesn't you may not have a real USB 3.0 charging system. Many from Amazon and the like are fakes.

    Sent from my SAMSUNG-SM-G900A using AC Forums mobile app
    08-11-2014 02:09 PM
  4. bbmjack's Avatar
    Mine is original 3.0 usb from samsung OEM I use it same s5 adapter
    And i see 2.0 faster than 3.0 do I need another adapter ?

    Posted via Android Central App
    08-11-2014 02:19 PM
  5. jmagid51's Avatar
    Seems like the adapter may be faulty. Surprising for an OEM product.

    Sent from my SAMSUNG-SM-G900A using AC Forums mobile app
    08-11-2014 02:26 PM
  6. ABOSWORTH007's Avatar
    My USB 3.0 cable definitely charges my phone faster than the regular cable. I have a regular cable at work that is plugged into the computer and it takes way longer to charge than my 3.0 and wall adapter that I have at home.
    08-11-2014 02:31 PM
  7. theonlybuster's Avatar
    Mine is original 3.0 usb from samsung OEM I use it same s5 adapter
    And i see 2.0 faster than 3.0 do I need another adapter ?

    Posted via Android Central App
    Either your adapter isn't pushing enough power or it's faulty. Either way, you're going to need a new high(er)-output adapter. 2.4amps should be suffice.
    08-11-2014 03:02 PM
  8. bbmjack's Avatar
    Don't know lol but I don't count that's why I see them same maybe because I use my phone while charging

    Posted via Android Central App
    08-11-2014 03:13 PM
  9. jmagid51's Avatar
    I use my phone during charging also, but it really shouldn't make a difference. I had a 3rd party system from Amazon and before it burnt up (smoke and all) it acted the same way. If it's faulty it will damage the phone.

    Sent from my SAMSUNG-SM-G900A using AC Forums mobile app
    08-11-2014 03:18 PM
  10. bbmjack's Avatar
    I think that's jordan electricity which already dims light all time

    Posted via Android Central App
    08-11-2014 03:33 PM
  11. bbmjack's Avatar
    But when battery drains it's slow to drain with 3.0 after charge

    Posted via Android Central App
    08-11-2014 03:41 PM
  12. jmagid51's Avatar
    I sent you a PM

    Sent from my SAMSUNG-SM-G900A using AC Forums mobile app
    08-11-2014 04:48 PM
  13. S5_GJH's Avatar
    2.0 and 3.0 will charge at the same speed.

    The reason it charges quicker than your S4 or your iPhone is because of the power adapter.

    3.0 has faster data transfer, not charging speed.

    Posted via Android Central App
    08-11-2014 05:16 PM
  14. Kleajmp's Avatar
    So can anyone explain the charging time when:
    • charging from usb3 port with usb2 cable [usb2 mode default]
    • charging from usb2 port with usb3 cable [usb2 mode default]
    • charging from usb3 port with usb3 cable [usb2 mode default]
    • charging from usb3 port with usb3 cable [usb3 mode which exits after 10min]

    by default when connecting to usb3 with genuine usb3 cable it goes to usb2 date transfer mode, but does it charge as fast as in usb3 mode?
    and does it charge faster than with usb2 cable or usb2 port?

    Nowhere I find a clear answer to this..
    Thanks in advance
    11-13-2014 06:57 PM
  15. AnonymousHero's Avatar
    So can anyone explain the charging time when:
    • charging from usb3 port with usb2 cable [usb2 mode default]
    • charging from usb2 port with usb3 cable [usb2 mode default]
    • charging from usb3 port with usb3 cable [usb2 mode default]
    • charging from usb3 port with usb3 cable [usb3 mode which exits after 10min]

    by default when connecting to usb3 with genuine usb3 cable it goes to usb2 date transfer mode, but does it charge as fast as in usb3 mode?
    and does it charge faster than with usb2 cable or usb2 port?

    Nowhere I find a clear answer to this..
    Thanks in advance
    From an electrical standpoint.

    USB ports up to 2.0 deliver 5 volts at 0.5 Amps (2.5 Watts).

    USB 3.0 ports deliver 5 volts and 0.9 Amps (4.5 Watts)

    Samsung OEM charger is 5.2 volts and 2.4 Amps (12.5 Watts)

    So a USB 2.0 port will be about 4 times as long to charge your S5. A USB 3.0 port will be 2.7x as slow just because they do not provide as many watts of charging power.
    BlurryEyed likes this.
    11-23-2014 08:42 AM
  16. AnonymousHero's Avatar
    From an electrical standpoint.

    USB ports up to 2.0 deliver 5 volts at 0.5 Amps (2.5 Watts).

    USB 3.0 ports deliver 5 volts and 0.9 Amps (4.5 Watts)

    Samsung OEM charger is 5.2 volts and 2.4 Amps (12.5 Watts)

    So a USB 2.0 port will be about 4 times as long to charge your S5. A USB 3.0 port will be a little over twice as long just because they do not provide as many watts of charging power.

    Now the question I have is does a normal microUSB cable in a 12 watt charger (like my car charger) charge the phone as fast as the wall charger that comes with the S5?
    BlurryEyed likes this.
    11-23-2014 08:46 AM
  17. nomadh's Avatar
    Ive done some testing.
    So far I was able to charge my s5 with a good quality non samsung 2amp ac charger with a good cable at about 1.7 or 1.8 amps. The same as the 2 amp samsung charger with or without its oem cable.
    USB 3.0 is faster at transferring DATA not power. I have a little usb amp/volt meter to check the numbers. If fact in some cases the oem cable can charge slower than aftermarket.
    I have a dell optiplex 7010 that can put out 1.5 amps to its usb 2 and 3 ports and my meter shows that using the oem cable it is limiting current to < .5A because it is using the other wires to allow data connection but if I use a Charging only cable the s5 can charge from the PC port at > 1 Amp.
    So basically everything mentioned here is dependent on nearly every part you are using. If you really want to know if you are charging you need to get a $10 usb meter. Its the only way to be sure. And you need to try every combination of parts. It can be very hard to tell at what rate your phone is charging.
    Generally charging from AC is faster but its very dependent on what charger or port and cable. And this shows that many PC's with the right cable can charge much faster than the default .5 Amps.
    02-02-2015 06:13 PM
  18. startacfan's Avatar
    Thanks for the common sense answer. The "brick" or adapter is the actual determining factor of total available power. I read that a schematic shows only the pins in the USB 2.0 section of the plug provide the actual AC charging voltage/current.
    systemofadown1 likes this.
    06-27-2015 07:33 PM
  19. systemofadown1's Avatar
    This is true, 2.0 & 3.0 are data speeds.
    Charging has Nothing to do with data. As long as your brick & cable can deliver 2100 mA to the phone it will charge at its fastest rate (from 25% to 100% in 90 mikes (minutes) ).

    *** Edit ***
    I just realized a typo in my post.
    Its 15% to 100% in 90 mikes not 25% to 100% as I originally stated
    06-28-2015 07:18 AM
  20. DroidDevv2's Avatar
    I think the only difference from 2.0 and 3.0 is the data transfer speed, not charging speed.
    harrybrookes likes this.
    06-28-2015 09:30 AM
  21. harrybrookes's Avatar
    Either your adapter isn't pushing enough power or it's faulty. Either way, you're going to need a new high(er)-output adapter. 2.4amps should be suffice.
    This isn't true, if you were to plug your phone into a USB 3.0 port on your laptop with a 3.0 cable, it'll transmit data a lot quicker than it would in a 2.0 or 1.1 port. Not sure if the same rule applies with charging via a laptop, maybe the 3.0 gives it the 0.9 amp, an extra little kick.

    Using a 2.0 cable or 3.0 cable for charging with a 2.4 amp mains charger will make no difference at all, they'll both charge as quick if they're both a good quality USB cable.
    11-19-2015 05:02 PM
  22. DeviceUser's Avatar
    please quit spreading misinformation, USB 3.0 cable are capable of transmittig up to 1.5 amps when there is no data connection and so are ableto charge mmuch faster than USB 2.0 cables. try it for yourself. here's the quickest way:

    using the same 2amp wall adapter plugged into the same wall jack connect the USB 2.0 cable to your phone and wait for 5 minutes then check the estimated time until full charge. try again with the USB 3.0 cable instead and you'll find that the estimated time will be less than half.
    02-02-2016 08:14 AM
  23. DeviceUser's Avatar
    not only that but with USB 3.0 you'll actually see it go up a percent about every 1 and a half minutes compared to barely any change at all on USB 2.0

    FYI both cables I used for the test were the original Samsung cables the black 2.0 USB is from my s4 and the white 3.0 was from my s5
    02-02-2016 08:15 AM
  24. LTA1's Avatar
    not only that but with USB 3.0 you'll actually see it go up a percent about every 1 and a half minutes compared to barely any change at all on USB 2.0

    FYI both cables I used for the test were the original Samsung cables the black 2.0 USB is from my s4 and the white 3.0 was from my s5
    Try the white cable for samsung s5... it is thicker than other samsung white cables. And also thicker than the s4 cable. I compared two oem samsung usb cables, the J5 (thinner cable) and the s5 (thicker)cable, on the same wall charger (S5's 5.3v2A) and yes, they have a difference.

    Posted via the Android Central App
    02-03-2016 10:49 AM

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