charging time through usbGeneral


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  1. cashX3r0

    cashX3r0 Well-Known Member This Topic's Starter

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    regular charging on the included charger is ~1100mA i think. i heard usb charging is rated at 100mA. how long will it take to charge from dead? and if i am tethering using easy tether will i still gain charge? (searched for this but came up with too many results.
     

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  2. armoredsaint

    armoredsaint Well-Known Member

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    iirc the included AC charger is 5V and 1A (1000mA) and on your computer's USB is 500mA i believe? when i tethered in the past with a windows phone, it will charge it at the same time from my laptop.
     
  3. zemerick

    zemerick Well-Known Member

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    With USB it massively depends on if you are using it or just have it asleep. Asleep your still lookin at a number of hours, but if you are playing a game with sync active you might still manage to lose charge. ( Granted, virtually none. After a couple hours playing a game, texting, facebook...always with the game in the background at the very least, I did go down 1 percent. ) If it's asleep it'll be close to only double the normal time because as mentioned USB is half the current of the wall charger. ( Due to the phone still taking some charge from the USB during this time is why it'll be a little over double. )
     
  4. zanza

    zanza Well-Known Member

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    so he people who plan to use the "USB Car Lighter adapter" may be in for a slow charge?
     
  5. bigvinny

    bigvinny Well-Known Member

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    USB charging from PC takes a long time... clicking on the jumbo-sized clock to open up HTC's clock app, and the battery status is on the bottom right corner. Usually takes about 6-7 hours for me to have it charged via PC, versus 2 hours from AC.
     
  6. Doitle

    Doitle Active Member

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    I actually managed to kill the phone while it was charging this morning. I was pretty shocked. It had died during the night so my alarm didn't go off. I forgot that when I put my laptop to sleep the USB ports are no longer active. So I wake up my laptop and the phone starts charging. I turn it on and bring up the mail client and bam black screen. After a few seconds of confusion I realize the phone had just died while charging. That is something else.
     
  7. zemerick

    zemerick Well-Known Member

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    You should be fine, but do be aware that those were designed to light cigs not power electronics. This means they have no real standards ( IE: They can be pretty much anything from like 5 volts to 16 volts based on certain situations and the design and anywhere around 10 amps ), the power can fluctuate which isn't good for electronics and especially for charging Li-Ion batteries which want a specific voltage, and also the plug itself is not suited to power electronics...they can vibrate loose for example, or worse "flicker" supplying power on and off fast with the engines vibrations.

    So: Car chargers are fine for the occasional "Woops, I forgot to charge my phone last night and I'm going to be on the road the next few hours" but daily charging will start to decrease your batteries life over time due to the fluctuations, intermittent connection, etc. Use a stable power source like a surge protected outlet for your normal charges.
     
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  8. svwilbur

    svwilbur Well-Known Member

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    I have run the battery down to nothing while using the phone on a USB port. I was apparently draining it faster than it provided a charge. It is probably harder to do that on the AC charger.

    I also found that if you turn GPS, bluetooth, wifi off and brightness down it will charge faster as it has less battery load on it. At least that is the perception I have.
     
  9. nstallion

    nstallion Well-Known Member

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    The amperage of a USB port on a computer varies but is a minimum of 100mA. It's impossible for us to tell you how much current your phone will be able to draw from your computer because it's not standard.
     
  10. amarryat

    amarryat Well-Known Member

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    I think that the better quality ones are regulated so it shouldn't be a problem. I had this one:

    Scosche Dual USB Car Charger

    which you can find on Amazon and Newegg and I think it was 1000ma output and regulated as well.
     

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