5 Replies Latest reply: Jan 9, 2012 6:21 AM by TakoBoy
Kwopau Level 4 Level 4 (1,725 points)
Okay I drained out my iphone 4 on the first charge, and I plugged it at 4:15 pm, and now it's 6:20 PM and as i write this the iphone 4 is charged up to 68% and still charging. I'm charging it through my laptop, which is also on A/C adapter as well. and my iphone is charging via USB (no hub), just the usb in the laptop, and it's been past 2 hours, I know that it shouldn't take this long to fully charge it. I'm at the college library and reading a book as I wait for my phone to fully charge as i didn't bring my the power adaptor for my iphone. I'm using the cable that was included with the iphone 4. I'm actually fine with it but the fact that I might have to miss my dinner as I don't want to leave my stuff behind while I go eat.

Anyways, is this normal as you charge via USB? I didn't think it would be this slow to fully charge up my phone.

ah well I guess i'll just have to disable the sleep mode when the lid closes and leave the laptop on while I eat. bah. Still annoying how it's not finished charging

HP Pavilion DV2812tx, HP DV4-1504tx, Windows 7, iPod Hi-Fi, iPhone 4 32 GB Black
  • Allan Sampson Level 10 Level 10 (123,370 points)
    This seems a little slow, but the following was copied from this link.

    http://www.apple.com/batteries/

    Most lithium-ion polymer batteries use a fast charge to charge your device to 80% battery capacity, then switch to trickle charging. That’s about two hours of charge time to power an iPod to 80% capacity, then another two hours to fully charge it, if you are not using the iPod while charging.


    Is your laptop set to sleep or be in standby mode after a designated period of time of no activity or usage?
  • Kwopau Level 4 Level 4 (1,725 points)
    No, my laptop is left running entire time. I do understand that when in standby or sleeping, or even hibernation that it will not charge.

    charged at 4:15 pm as mentioned,

    right now is 6:40 pm at 80%.

    my 1st replacement, the phone would charge to full in one hour, but then this was with my wall charger.

    Oh well the only solution right is to disable the sleep mode on my laptop while the lid closed and keep it running for temporary, as the dining hall closes at 7 pm so only 20 minute to get my food.
  • bushman4 Level 1 Level 1 (0 points)
    Be sure that the computer you are using has USB 2.0
  • Kwopau Level 4 Level 4 (1,725 points)
    Obviously it is running USB 2.0 as I believe most laptops these days comes with usb 2.0 unless if bought used.
  • TakoBoy Level 1 Level 1 (0 points)

    I bought iphone 4s about 2 months ago and just now I got charging problem too.

    I charge with wall charger for 2 hours and got 18%..

    The charging came normal again when I unplugged and then plugged the charger

    Just share.. Hope it usefull