Battery Life - Keep it charged or run it down?

Discussion in 'iPhone' started by jayes, Sep 19, 2012.

  1. jayes macrumors regular

    Joined:
    Oct 11, 2011
    #1
    A friend and I were having a discussion about the best way to maintain an iphone's (and other cell phone's) battery life. Her husband suggests that one should always run the battery down until it's almost dead and then charge it; the thought being a battery has just so many charges in it and you want to spread them out. I, on the other hand, am so afraid of running out of battery, I put my phone on the charger whenever I am near one. In fact, it's always charging when I am home. It rarely every goes below 40% unless I'm out the in the wild and most days no less than 80 or 90%. But now that my new iPhone is coming, I thought this was a good time to check it out.

    So... Run it down or keep it charged? Which is better to extend the life of one's cell phone battery?
     
  2. mojo pin macrumors regular

    mojo pin

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    Sep 4, 2012
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    Midwest,US
  3. JLee361 macrumors member

    Joined:
    Mar 20, 2012
    Location:
    Texas
    #3
    I read it's better for your battery life to let it run down at least somewhere under 10% - 20% and fully recharge it.
     
  4. lordofthereef macrumors G5

    lordofthereef

    Joined:
    Nov 29, 2011
    Location:
    Boston, MA
    #4
    With older battery tech it used to be that you wanted to discharge the battery before charging. It is not true anymore. Apple's site even attests to this. Too lazy to link it, but it's there.
     
  5. vgopal macrumors member

    Joined:
    Sep 9, 2010
    #5
    just charge the battery when you need to.

    running it down completely and charging it is stupid.

    these phone batteries arent like the old days, its not a problem to charge them at 50% or whatever
     
  6. Shadowbech macrumors 68040

    Joined:
    Oct 18, 2011
    #6
    It's not necessary to run it down each time. Just use the phone normally as you would and just recharge it anytime regardless. Apple recommends that you do a full discharge and a full recharge once a month.
     
  7. willmtaylor macrumors G3

    willmtaylor

    Joined:
    Oct 31, 2009
    Location:
    A Natural State
    #7


    This following was LITERALLY the first search result when I entered in "Apple," "iPhone," and "battery:" http://www.apple.com/batteries/iphone.html
     
  8. Codepiink macrumors regular

    Joined:
    Jun 24, 2010
    Location:
    Westchester County, NY
    #8
    An Apple tech told me to run it completely down once a month, then charge it completely, for about four hours to get the "trickle charge". Then on any other occasion you can charge it as you need to.
     
  9. Powrie macrumors 6502

    Joined:
    Sep 14, 2012
    #9
    When they say completely run it down... are you supposed to play a video or something till it dies ?
     
  10. JLee361 macrumors member

    Joined:
    Mar 20, 2012
    Location:
    Texas
    #10
    Use iPhone Regularly
    For proper maintenance of a lithium-based battery, it’s important to keep the electrons in it moving occasionally. Be sure to go through at least one charge cycle per month (charging the battery to 100% and then completely running it down).

    Good find.
     
  11. Codepiink macrumors regular

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    Jun 24, 2010
    Location:
    Westchester County, NY
    #11
    That's what I do. Or I play a game or go on instagram.
     
  12. iamthekiller macrumors 6502a

    Joined:
    Feb 3, 2010
    #12
    This is false. Lithium ion batteries do not have that memory effect. If anything, you're making the battery less efficient.
     
  13. GeeSixx macrumors regular

    GeeSixx

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    Sep 27, 2011
    Location:
    California
    #13
    I heard these new batteries are much more durable than they used to be.
     
  14. takeshi74 macrumors 601

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    Feb 9, 2011
    #14
    Where? Consider the source, as always.
     
  15. Allegrotechie macrumors member

    Allegrotechie

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    Mar 6, 2011
    #15
    Letting your battery get lower than 15 percent more than twice a month is very damaging to the li ons. Don't let it do that. Once a month, let it go to 0 then charge it to 100 overnight. Other than that once a month always charge it when you can, but once it is at 100, unplug it. Leaving it plugged in also damages the battery.
     
  16. JokerElite macrumors regular

    JokerElite

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    Sep 16, 2012
    Location:
    New Jersey
    #16
    Interesting thread. Lots of different ideas though.
     
  17. Mercenary macrumors 6502a

    Joined:
    Sep 17, 2012
    #17
    True, you shouldn't let your battery charge get too low. But the % you see isn't its true charge and capacity, it's a calculated result. The phone won't actually let the battery charge get so low that it can damage the cells. So when it says 0% it actually still has quie a but if charge. It's just shut off to preserve itself.

    Apple don't want you to have to think about these things, they take care of it and want you to just use it. Keep it topped up, use it regularly and all will be fine.
     
  18. Want300 macrumors 65816

    Want300

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    Oct 12, 2011
    Location:
    St. Louis, MO
    #18
    Apple's Recommendation:

    "For proper maintenance of a lithium-based battery, it’s important to keep the electrons in it moving occasionally. Be sure to go through at least one charge cycle per month (charging the battery to 100% and then completely running it down)."

    http://www.apple.com/batteries/iphone.html
     
  19. DVDxR macrumors regular

    Joined:
    Jun 18, 2009
    #19
    So if I don't go through a full charge cycle my electrons in my battery will stop moving? Resulting in the collapse of physics as we know it and the end to our entire universe?! :eek:

    Crap, owning an iPhone comes with a lot of responsibility!!
     
  20. Want300 macrumors 65816

    Want300

    Joined:
    Oct 12, 2011
    Location:
    St. Louis, MO
    #20
    With great power, comes great responsibility... :D
     
  21. CristobalHuet macrumors 65816

    CristobalHuet

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    Jan 18, 2008
    Location:
    Montreal
    #21
    I heard aluminum scuffs when you scratch it.
     
  22. VMMan macrumors 6502a

    Joined:
    Mar 29, 2009
    #22
    Don't let it run down. With most of the lithium ion polymer chemistries, once the voltage decreases below a certain level, the battery permanently becomes damaged and also loses capacity if it still functions.

    I also think that for most people who aren't storing their devices, it's not necessary to intentionally cycle through once a month.

    It's better to use the device and always charge it when you can. Don't deliberately let it discharge thinking its good for the battery.

    Low voltages are the death of lithium ion polymer batteries.
     

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