USB Charging takes forever

Discussion in 'Samsung Galaxy Nexus' started by cloud12077, Dec 19, 2011.

  1. cloud12077

    cloud12077 Member

    Joined:
    Mar 14, 2010
    Messages:
    246
    Likes Received:
    3
    Trophy Points:
    18
    Location:
    Minnesota
    Ratings:
    +3
    I have been charging my phone with the USB cable (that came with the phone) for the past 4 hours and I'm only at 35%. I'm not playing with the phone, not calling, not texting, not doing anything on the phone.

    Anyone else experiencing longer than normal USB charge times?
     
  2. Chizzele

    Chizzele Team Sourcery
    Developer

    Joined:
    Dec 25, 2010
    Messages:
    1,997
    Likes Received:
    17
    Trophy Points:
    103
    Location:
    San Diego CA
    Ratings:
    +17
    USB always charge slow as its only 1v.. plug it to the wall and you get higher voltage and faster charging. Its standard.
     
  3. stratjb

    stratjb Member

    Joined:
    Nov 21, 2009
    Messages:
    63
    Likes Received:
    0
    Trophy Points:
    6
    Ratings:
    +0
    Yeah, I'm seeing the same thing. It's not as bad as the Droid X was but it's similar.
     
  4. dezymond

    dezymond Tech Support Mod
    Staff Member Premium Member

    Joined:
    Nov 11, 2009
    Messages:
    12,080
    Likes Received:
    1,508
    Trophy Points:
    573
    Location:
    Bay Area, California
    Ratings:
    +1,672
    Current Phone Model:
    Google Pixel
    usb charges at half the voltage of your wall charger, so yes it'll take longer:)

    I don't know the exact numbers, but it is around half power
     
  5. cloud12077

    cloud12077 Member

    Joined:
    Mar 14, 2010
    Messages:
    246
    Likes Received:
    3
    Trophy Points:
    18
    Location:
    Minnesota
    Ratings:
    +3
    I was under the assumption that USB was always outputting roughly 5V. The charger is roughly 5V as well. The only thing I can see that might affect it is the amps? Also, I didn't bring my charger to work, lol.
     
  6. dezymond

    dezymond Tech Support Mod
    Staff Member Premium Member

    Joined:
    Nov 11, 2009
    Messages:
    12,080
    Likes Received:
    1,508
    Trophy Points:
    573
    Location:
    Bay Area, California
    Ratings:
    +1,672
    Current Phone Model:
    Google Pixel
    Hmm, didn't realize the wallcharger was 5v, just took a look at mine.

    Maybe it's built within android that when it charges usb it cuts voltage in half? That's just me assuming lol
     
  7. nbucko

    nbucko Member

    Joined:
    Feb 15, 2010
    Messages:
    239
    Likes Received:
    6
    Trophy Points:
    18
    Ratings:
    +6
    USB charges at 500 milliamps. The wall charger charges at 1 amp. The amperage is the amount of power going to whatever is plugged in. So charging via USB you will only get half the amount of power going to your battery as you would if you were using the wall charger and therefore it will take roughly twice as long to charge your battery via USB.
     
    • Like Like x 2
  8. cloud12077

    cloud12077 Member

    Joined:
    Mar 14, 2010
    Messages:
    246
    Likes Received:
    3
    Trophy Points:
    18
    Location:
    Minnesota
    Ratings:
    +3
    I kind of thought that the amps had something to do with it, but I wasn't 100% sure. Thank you
     
Search tags for this page

galaxy nexus takes forever to charge

,
galaxy note 10.1 taking forever to charge
,

galaxy s3 takes forever to charge

,
galxy note 3 takes forever to charge
,
my nexus 7 taking forever to charge
,

my phone takes forever to charge

,
why do phone chargers slow
,
why does it take forever to charge my galaxy phone
,
why does my phone take forever to charge with usb
,
why is my s4 taking forever to charge