Droid charge through USB

Discussion in 'Android Devices' started by absolutpolack, Nov 16, 2009.

  1. absolutpolack

    absolutpolack Member
    5

    Nov 15, 2009
    9
    0
    5
    So, Im returning/exchanging my droid for numerous battery issues. One of which i want to confirm. Is the Droid supposed to charge through the USB to computer connector? The device stays at the same level of charge but does not increase when its plugged into my computer.
     

    Advertisement
  2. Backnblack

    Backnblack Well-Known Member
    45

    Nov 15, 2009
    126
    0
    45
    Mine charges fine when using USB....If it's a port on the computer.... If I use one on the keyboard or monitor, I get no charge....
     
  3. absolutpolack

    absolutpolack Member
    5

    Nov 15, 2009
    9
    0
    5
    Its off my laptop haha, only computer i got at my apartment
     
  4. michaelk

    michaelk Well-Known Member
    36

    Oct 31, 2009
    162
    1
    36

    the droid appears to follow the USB spec (unlike MANY other devices) and it first connects to a usb port at only ~100 mA (which might barely charge faster than it uses power). Then it ASKS the host device for permission to use more power. I think it steps to 300 or 500 mA IF the host device says it's OK. If the host device doesn't reply that it's OK then the droid will not draw more power.

    if the laptop feels it doesn't have power to spare it will tell the droid to stay at 100 or only step to 300.

    for comparison the stand alone wall wart supposedly outputs 850 mA.

    when hooked up to a 3000 mA charger so it can suck it's max, the droid seems to pull something like ~1500 mA
     
    jamesdparker likes this.
  5. gotwillk

    gotwillk Well-Known Member
    38

    Nov 7, 2009
    365
    12
    38
    usb charges fine for me, although it is WAY slower than wall charging. takes 5 hrs for usb to charge from empty to full. wall charge takes about 1.5 hrs.
     
  6. syntrix

    syntrix Well-Known Member
    163

    Nov 6, 2009
    2,418
    303
    163
    engineer
    The South
    yup, some computers or usb hubs don't give the proper power to charge.

    Just test it with the ac connector, and if it charges, your computer probably is full of fail :)

    Chances are, the ac adapter will charge much faster than just a usb port, different milliamps on output.
     
  7. CarlosA

    CarlosA New Member
    5

    Jan 15, 2010
    2
    0
    5

    I have a usb car charger that says 5V, 1000mA. Will not charge my Droid but charges my bluetooth headset.
     
  8. sooper_droid12

    sooper_droid12 Well-Known Member
    128

    Nov 25, 2009
    1,228
    73
    128
    USB charging is like half the power. So, it may take at least twice as long to charge. You shouldn't depend on it for a full charge. It's kind of like if you need to get by for a bit.
     
  9. CarlosA

    CarlosA New Member
    5

    Jan 15, 2010
    2
    0
    5

    But this isn't slow charge, it's NO charge. The screen doesn't even say "charging xx%".
     
  10. stevenlong

    stevenlong Well-Known Member
    48

    Nov 13, 2009
    211
    11
    48
    Computer Programmer
    Austin, TX
    I've had this happen one other devices as well.
    Unless the driver is installed the computer does not recognize the device and does not provide it any power at all.

    Are you able to see the SD card on your computer when your droid is plugged in? If not possible it is a driver issue.
     
  11. teschoen

    teschoen Well-Known Member
    36

    Dec 29, 2009
    149
    1
    36
    No driver needed to charge from my USB ports on the monitors from my PC. Even works on a monitor not hooked up to the USB port on my PC.
     
  12. Bramsy

    Bramsy Well-Known Member
    153

    Jan 1, 2010
    1,516
    149
    153
    Awsome-o
    Birmingham, MI
    funny, i left mine DRRRRRRRROId on USB all night last night and think i got about 65% charge. i do indeed sleep about 4 hours and it was indeed a little longer, but USB for me is really just a sync chord :)
     
  13. PetiePal

    PetiePal Well-Known Member
    78

    Nov 17, 2009
    757
    43
    78
    Well I'm finally part of the Droid club lol. Got mine on Saturday. One of the first things I tested out was wall vs USB charge. USB does charge about twice as slow however it shouldn't be as slow as you're saying! Maybe 4 hours to a full charge from below 10%...anyone else see the same?
     
  14. teschoen

    teschoen Well-Known Member
    36

    Dec 29, 2009
    149
    1
    36
    I started charging via the wall at night and only use the USB to keep charge towards the end of the day if I have used the Droid more than normal.

    That said, the USB does charge the device in about 4 or 5 hours.

    The car charger does a great job btw.
     
  15. PetiePal

    PetiePal Well-Known Member
    78

    Nov 17, 2009
    757
    43
    78
    I ended up getting a secondary USB to MicroUSB to use in the car. Bought one of those Griffin USB cigarette lighter adapters. Comes with 2 ports so I can plug in my TomTom and phone at same time if need be. (Just have to find a USB to MiniUSB that will fit in the slot for my TomTom as it's got a weird body shape and a straight up plug won't seem to do the job.
     
  16. jimbo78255

    jimbo78255 Active Member
    16

    Nov 28, 2009
    25
    1
    16
    Yes, mine charges by USB, but it takes longer. I have not compared charging time with the disk mounted or unmounted, may do that test one day, though. Straight Droid to Laptop USB. Have used both the OEM USB cable and an after-market bulk purchase micro-USB.
     
  17. Groid

    Groid Well-Known Member
    53

    Dec 1, 2009
    358
    88
    53
    I can charge via usb to my desktop or laptop, but it's much slower than when plugged into a wall socket. I have an inverter in the car with a 1000Ma rated usb port. It doesn't charge my droid, but it does charge some of my other devices. Using the a/c plug on the inverter does charge my droid.
     
  18. allanlaw

    allanlaw Well-Known Member
    53

    Nov 12, 2009
    437
    31
    53
    Los Angeles, California
    My experience is that Motorola devices will sometimes not charge using a non-Motorola charger. On the other hand, everything seems to charge with a Motorola charger (bluetooth, Garmin, etc.).
     
  19. defkorn

    defkorn Well-Known Member
    43

    Dec 16, 2009
    270
    25
    43
    I've noticed this as well. I used a motorola mini-USB wall charger to charge my BlackBerry with no problems. When I lost that charger, I got one from RIM. I tried to charge my Motorola S9 bluetooth headphones with it, and it wouldn't charge.

    I can however, charge my Droid with a generic micro-USB charger and the charger that came with my friend's Palm Pre.

    But to get back on topic, yes USB is slow to charge. It took about 4 hours to get a full charge from 70%.
     
  20. jamesdparker

    jamesdparker New Member
    5

    Aug 3, 2010
    1
    0
    5
    do you know if there is a way to reconfigure device driver to supply more power? if possible, is it OS dependent?
     
  21. johnlgalt

    johnlgalt Antidisestablishmentarian
    VIP Member
    333

    Oct 28, 2009
    9,416
    1,922
    333
    Male
    Graduate Research Assitant | That part time IT guy
    3rd Rock
    No, there is not. It is USB specifications to supply only 500 mA, and many modern systems will detect an overvolting of the port as a short and the PSU may eithre shut down or the motherboard may shut down to prevent any problems.

    However, if you get an AC --> USB adapter like the one that came with your phone, I ahve seen those go as high as 1000 mA, thereby allowing a faster charge of the DROID.
     
    jamesdparker likes this.
  22. RichInVegas

    RichInVegas New Member
    5

    Jun 29, 2011
    1
    0
    5
    Here's whats going on. USB power is on pins 1 and 4. Data is on pins 2 and 3. A simple AC charger has pins 2 and 3 shorted together. This tells the phone that is an AC charger and to charge at a higher rate. If you are using a USB car charger and its not charging fast enough, you ned to modify it or get on that has pins 2 and 3 connected. The easy way to tell is to look at the battery stats on the phone. It will either say Charging USB or Charging AC. If it says USB its going to be charging at a slow rate.

    I opened up my USB car charger and wired 2 and 3 together and it now charges great. Some USB devices care, some dont. The Incredible needs pins 2 and 3 connected. Some iPods want 2 volts on pins 2 and 3 to make them charge. Other devices dont care.
     
  23. eric_meriza

    eric_meriza New Member
    5

    Jul 31, 2011
    1
    0
    5
    Hello there. I've read somewhere that a laptop can still charge a usb device, in my case an Android phone, even when the laptop is off but connected to a wall socket. Anyone heard about it or even tried it ? As for charging time it takes around 4 hours to fully charge my Samsung GTI5500 but then the battery doesn't last as long as if it was charged with the adaptor.
     
  24. takeshi

    takeshi Well-Known Member
    163

    Dec 6, 2009
    3,354
    282
    163
    You're still limited by whatever current the charger can provide. USB maxes out at 500mA (USB3 is higher). Check the specs on your charger. The more current, the faster the charge. My car charger supplies 950mA, for example.

    Depends on the laptop. Mine do not provide power to the USB ports when shut down. As stated above, USB is limited to 500mA so I don't use it to charge for that reason.
     
  25. Mise1

    Mise1 New Member
    5

    Nov 12, 2011
    1
    0
    5
    My Casio Commando doesn't seem to be charging via the USB port on my laptop either. The red light doesn't come on, nor do I see the battery icon on the top of the screen indicate that the battery is charging. I do have the USB selected to "Charge Only". When I first plugged my phone and cable in to the USB port, I got a message on the laptop that a new device had been plugged in, but could not be installed. Any help would be appreciated. Thank you.
     

Share This Page

Loading...