How OCD are you about the battery level?

Discussion in 'iPad General Discussions' started by beesknees, Apr 20, 2012.

  1. bassman99
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    bassman99 iPF Novice

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  2. beesknees
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    beesknees iPad Fan

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    I agree with this. I read the article about the parasitic demand during charging and it being better to power it down during charging but that is not how the iPad is designed to work anyway. Anyone who has powered it down then plugged in the cord can tell you it boots back up and goes back into standby where it definitely pulls power.

    My compulsion is to keep it charged not to extend the life of the battery or even the tablet. I use reasonable precautions to keep it tip top shape but I bought it to use not sit in its original packaging surrounded by bubble wrap. For instance I think scratches to the back of the tablet are more likely than the screen so I don't bother with a screen protector.

    T
  3. youngun
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    youngun iPF Novice

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    Wow, you are just like me. I have exactly the same thought process!
  4. AmazingGraceTx
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    AmazingGraceTx iPF Novice

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    I've been letting mine run down to about 30%, then charging overnight. So far, no real battery concerns.
  5. zphone
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    zphone iPad Enthusiast

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    The new batteries are lithium polymer so there are significant differences in characteristics.
  6. drathbun
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    drathbun iPF Novice

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    But this section of that article seems to relevant as they claim the lithium polymers have the same characteristics:

    Simple Guidelines for Charging Lithium-based Batteries

    A portable device should be turned off while charging. This allows the battery to reach the threshold voltage unhindered and reflects the correct saturation current responsible to terminate the charge. A parasitic load confuses the charger.

    Charge at a moderate temperature. Do not charge below freezing.

    Lithium-ion does not need to be fully charged; a partial charge is better.

    Chargers use different methods for “ready” indication. The light signal may not always indicate a full charge.

    Discontinue using charger and/or battery if the battery gets excessively warm.

    Before prolonged storage, apply some charge to bring the pack to about half charge.

    Over-discharged batteries can be “boosted” to life again. Discard pack if the voltage does not rise to a normal level within a minute while on boost.

    Sent from my iPad3 using iPF
  7. beesknees
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    beesknees iPad Fan

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    But they are never off in normal use. Also, unless I see some bench data that using them while plugged in is either a safety concern or causes a dramatic reduction in battery life I don't think I care. I doubt I use any of my electronics in absolutely ideal conditions/ways all the time.
  8. drathbun
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    drathbun iPF Novice

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    Ok. I know this is about an iPhone but it relates directly to the battery discussion here. My son has an iPhone 3S and he just showed me what has happened to it. He has left it plugged into a Pioneer bedside stereo unit as his music machine (he has a new Windows phone as a phone). So basically, after being left in a charger that obviously does not turn off the charge, the iPhone 3S's battery as expanded to the point it has pushed the glass out the front and pushed out the back. It still works but does not hold a charge.

    So the question is, if you leave your iPad in the charger (I assume the Mac 10w charger just keeps charging?), then your iPad will grow fat?

    [​IMG]

    [​IMG]

    [​IMG]

    Sent from my iPad3 using iPF
  9. AQ_OC
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    AQ_OC Super Moderator Staff Member

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    Interesting. It probably depends on the type of battery involved. I've had my blackberry curved plugged into power everyday for the last two years....just a regular USB plug. I use it as an alarm clock.....no exploding battery or getting fat....yet. I'm now doing the same with my android phone....

    Now....speaking of rechargeable batteries and a charger ..... I left some batts in my charger to a while....and this nasty white crap came out....had to toss the batts and clean up the charger.
  10. zphone
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    zphone iPad Enthusiast

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    The current iPhone and iPad batteries have a smart circuit that shuts down current to the battery when it gets full. That is built into the battery itself.

    What you show happening is pretty unusual. Likely because one of the cells leaked oxygen. It's lucky it did not catch fire.
  11. Beary
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    Beary iPF Noob

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    I'll charge when it's around 50%. But I'll do a full charge once a month when it drop till 15% :)
    I always make sure my iPad 2 got battery too :)
    Cheers!!
  12. drathbun
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    drathbun iPF Novice

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    So you think it might be a result of a flaw in manufacturing rather than over charging? You think perhaps he should return it to Apple?

    Sent from my iPad3 using iPF
  13. zphone
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    zphone iPad Enthusiast

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    It does not have to be a flaw as it could be a result of leaving the device in a hot car - where temperature can get to 160 in the sun - when the polymer layers melt you could have a similar situation. If it was never in extreme heat then maybe it is a flaw.
  14. Hasty
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    Hasty iPad Ninja

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    We have all three variants here and I never bother with charging now.
    When it gets to 5% it lets you know, but it doesn't do any harm to let it completely run out.
    I just charge every morning regardless of the state of the battery and haven't noticed any degradation in charge duration.

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