[Merged] iPad Battery Life Impressions Thread

Discussion in 'iPad' started by autopsytheclown, Apr 2, 2010.

  1. autopsytheclown macrumors newbie

    autopsytheclown

    Joined:
    Mar 30, 2010
    #1
    ModNote: Please use this thread for discussion of iPad battery life impressions and related concerns.

    When we get our precious little iPads, how much battery life will be available do you think? This is my 1st pre-order so for those who pre-ordered an iPhone might have an answer.
     
  2. msduncan macrumors 6502

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    Jan 27, 2010
    #2
    Can't we just plug them in and play with them while they charge? Not being snarky, but asking a serious question....
     
  3. autopsytheclown thread starter macrumors newbie

    autopsytheclown

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    Mar 30, 2010
    #3
    Yeah that is what I am doing but was just curious what % people think will be available out of the box. Once I open mine I am checking it out for sure then I will sync it to iTunes and transfer my stuff over.
     
  4. Maximillian macrumors 6502

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    #4
    I'm guessing 80-90% charged.
     
  5. PBG4 Dude macrumors 68000

    PBG4 Dude

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    Jul 6, 2007
    #5
    I imagine they'd have to hold a decent charge if Apple workers are going to be pulling them from boxes and setting them up for customers (there's only so many outlets at the genius bar).
     
  6. h00ligan macrumors 68030

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    #7
    Actually speaking of this - what's the full charge time when on and plugged into a wall (sleeping)?
     
  7. PBG4 Dude macrumors 68000

    PBG4 Dude

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    #8
    Usually, Lithium Polymer (LiPo) batteries can be charged at a maximum rate of 1C, or 1 times their max capacity. A 1000mAH battery can be charged at a rate of 1000mA (1A). At this rate, a completely depleted battery would take roughly 1 hour to recharge. In reality, a LiPo can only be 80% discharged without killing the battery / seriously decreasing usable battery life, so a recharge should only take 45 minutes, in theory.

    I don't know if Apple will allow the battery to recharge at 1C though because it might produce too much heat while the battery charges.
     
  8. SebZen macrumors 6502

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    Apr 12, 2009
    #9
    We're all engineers here and have a pretty good idea what you are talking about.
     
  9. bluehaze013 macrumors 6502

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    Nov 23, 2007
    #10
    Battery life?

    Been using my iPad for about 3hours now and I'm down to 60% battery left so I'm guessing about 6-7 hours battery life constant surfing over wifi. How is everyone else doing with regards to battery life?
     
  10. pimentoLoaf macrumors 68000

    pimentoLoaf

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    #11
    Not using Wifi yet and so after four hours, the li'l battery icon still appears to be fully charged.

    :eek:
     
  11. woodekm macrumors 65816

    woodekm

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    Feb 24, 2008
    #12


    Ditto!

    Waiting for SOME kind of drop soon.
     
  12. brock2621 macrumors 6502a

    brock2621

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    Jun 8, 2007
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    Kentucky
    #13
    Been HEAVILY using since 9:40 and I'm at 68%. These new samsung chips are truly impressive.

    EDIT: that's WITH location services, 15 min mail fetch and push notifications all on
     
  13. Julien macrumors G3

    Julien

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    Atlanta
    #14
    How on earth could battery life be determined today since it would need to charge several hours to insure a full charge (the last few percent are the slowest (trickle charge)):confused:
     
  14. brock2621 macrumors 6502a

    brock2621

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    #15
    Mine came with 96%, took about 25 mins to fully charge
     
  15. iParis macrumors 68040

    iParis

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    #16
    How in the world would you know the exact percentage? o_O?
     
  16. Diversion macrumors 6502a

    Diversion

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    Jacksonville, Florida
    #17
    I don't know how Apple did it.. but the battery life is insanely good. Been using mine on wifi, gps on, and push on for almost 4 hours now and only down to 78% battery.
     
  17. bluehaze013 macrumors 6502

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    Nov 23, 2007
    #18
    Did you charge it to full first? Your battery life seems much better than mine...didn't charge mine all the way started at 97% perhaps it will be better once I drain it and recharge.
     
  18. Diversion macrumors 6502a

    Diversion

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    Jacksonville, Florida
    #19
    There's an option to show battery percentage. Mine came stock with percent on, not sure why some don't.
     
  19. iParis macrumors 68040

    iParis

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    New Mexico
    #20
    Whoa, it's a good thing they did. Personally I don't know why it wouldn't come with it set on default.
     
  20. Julien macrumors G3

    Julien

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    Atlanta
    #21
    Battery meters are not that accurate and you can't know for sure if it was a full charge. You would need to leave on charge for several hours to be sure all the cells were in fact fully charged.
     
  21. iParis macrumors 68040

    iParis

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    New Mexico
    #22
    Kinda right and kinda not. Just because the battery meter is full doesn't mean it's fully charged. But it is fully charged when the icon changes from a lightning bolt to a "charged" icon.
     
  22. Alchematron macrumors 65816

    Alchematron

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  23. brock2621 macrumors 6502a

    brock2621

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    Kentucky
    #24
    The icon switched to a "plug" icon and the screen lit up. Messed with it for two more mins while plugged up and then unplugged it. I forgot to mention I also have the "Boy Robot - Rotten Cocktails" album playing in the background as well so I'm really stressing it.
     
  24. iParis macrumors 68040

    iParis

    Joined:
    Jul 29, 2008
    Location:
    New Mexico
    #25
    Yeah, that's what I mean. Your iPad is definitely fully charged, even if it's playing music in the background. Once the battery is fully charged, the iPad draws the rest of it's power from the source it's plugged into and not the battery until it is unplugged.
     

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