What does the little plug in the battery-symbol exactly mean?

Discussion in 'iPhone' started by utopia699, Aug 6, 2008.

  1. macrumors newbie

    Joined:
    Jul 19, 2008
    #1
    I know it means the battery is fully charged.

    But does it also mean the Iphone is running on mains power supply?

    Does it use up “charing-cycles” when i use my fully charged Iphone plugged in, or does it preserve battery life?


    Or think of it like this:
    If you leave your brandnew iphone plugged into a charging station all the time, and only drain the battery once a month, will the battery be almost like new after one year? Or will this hurt your battery life?

    Or does it get all its energy directly from the mains power supply when plugged into a charging station?
     
  2. macrumors regular

    Joined:
    Jul 23, 2007
    Location:
    south coast, uk
    #2
    i read somewhere else on this forum that it uses the battery still, and the mains just replenishes the battery. so i think it still uses the same number of cycles than if you unplugged it and then charged it when it ran out.
     
  3. thread starter macrumors newbie

    Joined:
    Jul 19, 2008
    #3
    thankx! do you have a link?

    cause i couldnt find anything offical from apple on this subject!
    is there no email-adress or telephone-number for this kind of specific questions???
     
  4. macrumors 6502a

    Joined:
    Jul 16, 2008
    #4
    I don't know how it is on the iPhone but two of my PowerBooks lost battery life after staying plugged in most of the time. Both of them were used mainly as desktop computers so they were almost always plugged in. Within a year, both had dramatically shortened battery life and no attempts at reconditioning their batteries helped.
     
  5. macrumors 603

    Warbrain

    Joined:
    Jun 28, 2004
    Location:
    Chicago, IL
    #5
    Different type of battery. Those older batteries in a PowerBook - outside of the last 15-inch model - needed use to be healthy. The current batteries in the laptops prefer to be plugged in when possible.

    And it has no connection to the iPhone.
     
  6. macrumors 6502

    Joined:
    Oct 16, 2007
    Location:
    Canada
    #6
    Hence why Apple's battery guide suggests discharging the battery completely at least once a month to condition the battery...

    Notebook Battery Guide

    iPhone Battery Guide
     
  7. macrumors member

    Joined:
    Jul 24, 2008
    #7
    Once the battery is fully charged the phone will run off the power supply. Leaving it on a charger for a month will hurt your battery life as Li-ion batteries need use to stay in good shape. You shouldn't store Li-ion batteries at full charge, so think of keeping your phone on a charger for a month as storing it with a full charge.
     
  8. thread starter macrumors newbie

    Joined:
    Jul 19, 2008
    #8
    But is it good for for the battery if you keep it plugged in as often as possible?

    Or does this method use battery-cycles like normal battery-use, so it would be indifferent and wouldnt matter?
     
  9. macrumors 6502a

    Joined:
    Jul 16, 2008
    #9
    What is the difference? I thought they both used Lithium-Ion batteries. Are you saying the battery's controller is different? :confused:
     
  10. thread starter macrumors newbie

    Joined:
    Jul 19, 2008
    #10
    Up
     
  11. macrumors 6502

    Joined:
    Oct 16, 2007
    Location:
    Canada
    #11
    I am fairly certain that keeping it plugged in constantly does not use battery cycles. It does not on my MacBook. The power unit just bypasses the battery once it's fully charged. I'm not sure how much of an issue this is seeing that this is a cell phone. The nature of cell phones is that you carry them around with you, and hence do not have them plugged in.

    Bottom line is you can have it plugged in constantly if you really want to, but make sure you discharge it fully once a month to exercise the battery.
     
  12. thread starter macrumors newbie

    Joined:
    Jul 19, 2008
    #12
    thankx! thats what i wanted to hear!

    do you have a link?

    i cant find any offical info from apple about "the power unit just bypassing the battery once it's fully charged", like in the macbooks...

    which offical apple phone-number or email-adress could you ask such a question?
     

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