Battery charging habit. Is this bad?

Discussion in 'iPhone' started by OrangeCuse44, Nov 11, 2008.

  1. OrangeCuse44 macrumors 65816


    Oct 25, 2006
    Long Island, NY
    I charge my battery over night but since the iPhone must remain on the power is drawing to it all night. Is this harmful to the battery in anyway to keep it plugged in for so long every night?
  2. benflick macrumors 68020


    Jul 11, 2008
    Cincinnati, Ohio
  3. Etnies419 macrumors 6502

    Sep 9, 2008
    No, once the battery is fully charged, it runs off of the AC power instead of the battery power.
  4. Auzburner macrumors 65816


    Apr 11, 2008
    Syracuse, NY - USA
    Yup, same here. Mine would barely last 2 days, so why worry about the battery life... I just charge it every night - all night. Except on the weekends.
  5. firewood macrumors 604

    Jul 29, 2003
    Silicon Valley
    Just make sure that you run the battery down as far as the phone will let you and then recharge it to 100% somewhere between at least once a year and once a month. The OS software that draws that little battery gauge icon needs to occasionally see those endpoints to set its calibration accurately.

  6. Bryan Bowler macrumors 68040

    Sep 27, 2008
    As others have said, you have nothing to worry about. I keep mine at a dock when I'm at my desk at work and often leave it on a dock at home at night. It'll run off AC power once fully charged...

  7. bengal85 macrumors regular


    Oct 22, 2008
    actually you can expand the life of your battery by only charging it when its dead
  8. mcmanus7 macrumors 6502a

    Oct 30, 2008
    since when does your phone have to remain on to charge it? I just put it on the charger... turn off the phone and walk away... it's fully charged when I wake up

    Bengel - the iPhone battery is Lithium based meaning it doesn't have the memory effect... you're thinking about NiCad rechargeable batteries that have a memory which can be affected by charging early... as mentioned Lithium's do not have such a problem...

    Apple suggests to drain the battery to 10% then do a full charge once a month to have optimal battery life... The only real way to harm your battery is to do a complete drain then not charge straight away... your phone does have a 5-10% reserve that needs to be sustained..
  9. iMetalG5 macrumors 6502a

    Apr 13, 2005
    good to know. i discharge (until it shuts itself off) my iPhone once a month and put it on the charger right away. but i guess i really don't have to wait until it shuts itself off to do this.

    i am paranoid, my old iBook G4 battery is a mess, can't even hold a charge and i rarely discharged that batt. my new Macbook Pro is doing ok but i'm trying to discharge it a few times a year...
  10. TheSpaz macrumors 604


    Jun 20, 2005
    No. That actually shortens the life of the battery. There's tons of information about Lithium Ion Batteries... They only have a limited amount of charge cycles. 1 charge cycle is running it all the way down, and then back up again. But, if you run it down half way, charge to 100% and then run it down half way again... that equals 1 charge cycle as well.

    You only have to run it down to 0% once to calibrate the battery indicator.

    Sorry to disappoint you.
  11. jmann macrumors 604


    Dec 8, 2007
    bump on a log in a hole in the bottom of the sea
    I leave mine charging over night every night. It seems fine to me. :D
  12. gadgetdad macrumors 6502a


    Sep 10, 2007
    On my iPhone
  13. OrangeCuse44 thread starter macrumors 65816


    Oct 25, 2006
    Long Island, NY
    Glad to see we're all on the same page here. I'm relieved.

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