Need help! Problem when charging my Verizon iphone 4

Discussion in 'iPhone Tips, Help and Troubleshooting' started by Phoneinfo, Feb 20, 2011.

  1. Phoneinfo macrumors newbie

    Feb 20, 2011
    First, let me say I was one of the ones that jumped ship from AT&T's iphone to the Verizon iPhone, and I haven't looked back. Got it the first day, and haven't dropped a call yet. 4-5 bars everywhere I go. Very happy!

    I do have a question about charging the iphone. Every night before going to bed I plug in my iphone and it charges until I wake up. I'll look at my iphone when I wake up and it has anywhere from 92-100% battery life. I'll get ready for work, and go unplug it and the batter life has gone from 97%-94%. Or this morning I woke up and it was at 92%. I got ready, and an hour later before leaving the house it was UP to 98%. I've noticed this pattern every day and it never dips below 92%, but goes up and down until I unplug it. However, my wife's exact same iphone 4 from Verizon stays at 100% battery life until she unplugs it. Anyone else having this problem? Is it a setting?

    Thanks for the help!
  2. AlexIamandi macrumors newbie

    Feb 4, 2011
    That looks like a hardware problem. You should let it charge completely, 100%.
  3. Phoneinfo thread starter macrumors newbie

    Feb 20, 2011
    It does charge up to 100%. But then it starts to trickle down to 92%, then back up to 100%. It goes up and down in the 90-100% range.
  4. vincenz macrumors 601


    Oct 20, 2008
    Do a couple of full discharge/recharge cycles and then see if the same thing happens. If so, you probably need to get it replaced.
  5. JamesMB, Feb 20, 2011
    Last edited: Feb 20, 2011

    JamesMB macrumors 68000


    Jan 2, 2011
    As phoneinfo said, that is the way it works. When it reaches full charge, the charging circuitry terminates the charge to prevent overcharging. If the phone is in use, (not powered down) the charging circuitry will let it drop down below 95%, before it will start charging again. It will complete that cycle as long as you have it plugged in, and in use.

    Just think about it, it has to work this way, otherwise the phone would overcharge, the battery would swell, and the back glass would be laying on the floor when get up in the morning.:D
    Whoever designed the charging circuit for the phone, knew what they were doing. A design without this function, would be considered poor at best.

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