How Many Times Do You Have To Drain Battery At First?

Discussion in 'iPhone' started by penajmz, Sep 22, 2014.

  1. penajmz macrumors 68030

    penajmz

    Joined:
    Sep 11, 2008
    Location:
    New York City
    #1
    To start seeing normal battery discharge? I'm on my second total discharge now to charge up to 100% again.


    How many times do you think it takes?
     
  2. maflynn Moderator

    maflynn

    Staff Member

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    Boston
    #2
    Zero, I don't deep drain my battery, its shortens the lifespan.
     
  3. KentuckyHouse macrumors 68020

    KentuckyHouse

    Joined:
    Jan 29, 2010
    Location:
    Lexington, KY.
    #3
    Actually, you've gotten some bad information somewhere. With Lithium Ion batteries, you NEVER want to completely drain them (if you can avoid it). You don't have to "condition" these batteries, and draining them completely can actually shorten their life.
     
  4. quagmire macrumors 603

    quagmire

    Joined:
    Apr 19, 2004
    #4
    I do it once to make sure I don't have a bad battery. But that's it for me because as mentioned full discharges and recharges kills a battery.
     
  5. penajmz thread starter macrumors 68030

    penajmz

    Joined:
    Sep 11, 2008
    Location:
    New York City
    #5
    Oh wow, this is definitely new information for me. Let me plug it in right now then...

    ----------


    I've only done it once so far too so I'll stop now.
     
  6. ROLLTIDE1 macrumors 65816

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    Sep 12, 2012
    #6
    I do the exact same thing with mine:D
     
  7. winterny macrumors 6502

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    Jul 5, 2010
    #7
    Doing one full drain cycle will calibrate the battery charge indicator, so you will be more accurate about how much remaining life you have -- which will probably allow you to use more battery before you think the battery will die.

    Typically, if you drain an iPhone down to 1% battery life, you will find that it will continue to work for 30+ minutes, because the calibration is incorrect.

    To properly calibrate:
    1) Fully charge battery (let sit overnight)
    2) Fully drain battery until screen TURNS OFF
    3) Fully charge battery (let sit overnight)

    This doesn't actually give you any more battery life, but you will be able to use more due to better information.
     
  8. penajmz thread starter macrumors 68030

    penajmz

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    Sep 11, 2008
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    New York City
    #8

    I think you're absolutely right. When I first drained it on Saturday it lasted a loooong time at 1%.
     
  9. Vertigo50 macrumors 65816

    Vertigo50

    Joined:
    Apr 11, 2007
    #9
    This.

    Apple recommends doing this calibration about once a month. Otherwise just use the battery however you want it.

    As for the others here saying it harms the battery? What are you smoking? Show me a link. There is absolutely no evidence of that.

    https://www.apple.com/batteries/
     
  10. GlenK macrumors 6502a

    GlenK

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    Aug 1, 2013
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    St. Augustine, FL
    #10
    ^Exactly. I usually do it twice when I first get a phone, then once a month thereafter.
     
  11. maflynn Moderator

    maflynn

    Staff Member

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    #11
    I looked through that link and didn't find where it recommends calibrating it (deep draining) it once a month. I think years ago that was the case, but there is no longer a need to calibrate iPhone batteries. I've never calibrated mine and the reporting statistics were spot on.

    Usage will help break in the battery and improve performance but I think overall you do more harm then good with draining it once a month.

    For intance, my wife deep drained where battery on her iPhone 5, not for calibration sake but just usage, I on the other hand avoided that. My battery was significantly in better shape then her phone's.
     
  12. barjam macrumors regular

    Joined:
    Jul 4, 2010
    #12
    They are a bit confused. If you drain a lithium battery completely it destroys them. There is circuitry involved that prevents this. So an "empty" battery isn't really empty.
     
  13. formerpc macrumors 6502

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    Apr 15, 2009
    #13
    Wow, you're right! Wonder when this changed? This is really good to know- thank you!
     
  14. winterny macrumors 6502

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    Jul 5, 2010
    #14
    Once a month is probably excessive, but I have certainly found the calibration on my 5s to be off, and re-did the calibration probably once every 3 months.

    In some cases I would get up to 1 hour after reaching 1% -- that's a pretty big calibration error to ignore, and a lot of life to leave on the table.
     
  15. Vertigo50 macrumors 65816

    Vertigo50

    Joined:
    Apr 11, 2007
    #15
    Not a good test. Some iPhone 5 batteries had serious problems. Still, maybe you're right about Apple's recommendations. I haven't looked through it all in a while.

    I do know calibrating helped a lot when I had a battery that kept shutting down at about 10%.
     
  16. Shadowbech macrumors 68040

    Joined:
    Oct 18, 2011
    #16
    I just do it once out of the box and after that I just charge normally. Although it's not necessary to do it on first charge out of the box as it comes pre-conditioned but I like to test how long my device lasts.
     
  17. antiprotest macrumors 65816

    antiprotest

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    Apr 19, 2010
    #17
    You can do it but it's not really necessary and draining a lithium ion battery actually damages it so don't do it too much.
     
  18. andyx3x macrumors 65816

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    Mar 1, 2011
    #18
    I do it once a month. Don't know if it helps or not but I do it anyway.
     
  19. anthonybkny macrumors regular

    anthonybkny

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    Feb 15, 2011
    Location:
    NYC
  20. Alexander.Of.Oz macrumors 68000

    Alexander.Of.Oz

    Joined:
    Oct 29, 2013
    Location:
    Adelaide, Australia
    #20
    There's an interesting article over on phys.org's site about a fairly recent (April of 2013) find about lithium-ion batteries.

    Read more at: http://phys.org/news/2013-04-memory-effect-lithium-ion-batteries.html#jCp
     
  21. shox2k2 macrumors 6502

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    Jun 18, 2010
    Location:
    Wichita, KS
    #21
    I drain out of box. Full charge. Drain again. Full charge. Good to go. My numbers weren't very strong with battery usage at first. Then after the 2nd charge it was looking good after a few hours use and standby.
     
  22. quagmire macrumors 603

    quagmire

    Joined:
    Apr 19, 2004
    #22
    Not confused. Lithium ion batterries hate doing full drains and fully recharging. While it doesn't exactly damage the battery, it makes it wear down faster leading you to replace it sooner. Whether it matters to people who upgrade every 2 years, probably not. But want that battery to last a long time? Avoid full cycles( 100%->0%->100%).

    It's why the Chevy Volt only uses ~50% of its batteries capacity. It drains down to about 30% and charges up to 80%. This produces less wear on the battery making it last longer.

    Also using high power chargers also put more wear on the battery. You may be able to charge it faster, but the battery won't last as long.
     

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