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Battery plugged in with 100%

This is a discussion on Battery plugged in with 100% within the iPad General Discussions forums, part of the Apple iPad Discussions category; I have question about battery. If The iPad battery is charged 100% and I kept it plugged into a power outlet. Dose it harm the ...

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Thread: Battery plugged in with 100%

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    Battery plugged in with 100%

    I have question about battery. If The iPad battery is charged 100% and I kept it plugged into a power outlet. Dose it harm the battery in anyway using it in this state or leaving for hours?

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    Welcome to the forum! There are a lot of great people here willing to lend a hand anytime. Often using the Advanced Search box (at the top of every page) will lead you to the answers you're looking for. If not, feel free to post a question in the appropriate area.


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    Regarding your question, there's no "harm" in leaving your iPad plugged in. However Apple recommends that their battery supported devices including iPads, iPhones, MacBooks, etc. not be left plugged in. Although it doesn't do any damage to the device it can throw off the battery percentage reading; the amount of time left before the battery runs out. If that happens, the device needs to be reset. Here's how to do that on the iPad:

    iPhone, iPad, iPod touch: Turning off and on (restarting) and resetting

    Welcome again and enjoy!

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    Quote Originally Posted by wa7shish View Post
    I have question about battery. If The iPad battery is charged 100% and I kept it plugged into a power outlet. Dose it harm the battery in anyway using it in this state or leaving for hours?
    Thats the $64k question, isnt it? Ive searched quite a bit on this topic and as usual - the internet offers opinions from just about every angle. Ive read on various forums and other publications:

    1) Every month or so, let the battery completely die or get to about 5% and then fully charge it. Do this once a month or thereabouts.
    2) Do NOT leave it plugged in when fully charged.... unplug it when it hits 100%. Thats why I charge during the day if at all possible.
    3) otherwise, when it gets down to about 20%-30%, charge her up.

    So, unless someone proves otherwise, I wouldnt leave it charging when its at 100% - it might shorten battery life.

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    So, there is no prove that it might harm the battery right? From what I understood that only once a month let the battery dies or 5% and for the rest of the other days I charge it at between 20 and 30%.
    Thanks for the respond

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    Yes - running the battery down occasionally is for the sole purpose of calibrating the battery meter.

    Tim

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    Quote Originally Posted by s2mikey View Post
    Thats the $64k question, isnt it? Ive searched quite a bit on this topic and as usual - the internet offers opinions from just about every angle. Ive read on various forums and other publications:

    1) Every month or so, let the battery completely die or get to about 5% and then fully charge it. Do this once a month or thereabouts.
    2) Do NOT leave it plugged in when fully charged.... unplug it when it hits 100%. Thats why I charge during the day if at all possible.
    3) otherwise, when it gets down to about 20%-30%, charge her up.

    So, unless someone proves otherwise, I wouldnt leave it charging when its at 100% - it might shorten battery life.
    Nope. Leaving a li-ion battery plugged in when it is fully charged does no damage to the battery, whatsoever. The charging circuit simply shuts off when the battery is fully charged. Look at it this way. If keeping a device plugged in reduced the life of the battery, don't you think Apple would mention it in the battery care documentation they provide? Not necessarily because they care about users but simply to provide a rationale for charging customers to replace batteries..."You didn't leave this iPad connected to a charger after it was fully charged, did you? Well, you should have read the instructions..."

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    thanks JSH1120,
    didnt know that all the battery unplug thing was a myth

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    Yes, JSH1120 is right. There's not a problem in leaving it plugged in to the charger 24/7.

    Tim

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    Quote Originally Posted by Tim SPRACKLEN View Post
    Yes, JSH1120 is right. There's not a problem in leaving it plugged in to the charger 24/7.

    Tim
    See now, Ive read otherwise when discussing these particular types of batteries but Ill go with what you guys say.

    Quote Originally Posted by jsh1120 View Post
    Nope. Leaving a li-ion battery plugged in when it is fully charged does no damage to the battery, whatsoever. The charging circuit simply shuts off when the battery is fully charged. Look at it this way. If keeping a device plugged in reduced the life of the battery, don't you think Apple would mention it in the battery care documentation they provide? Not necessarily because they care about users but simply to provide a rationale for charging customers to replace batteries..."You didn't leave this iPad connected to a charger after it was fully charged, did you? Well, you should have read the instructions..."
    Well - Apple doesnt have to tell us every little thing about the charging details. Im with you though.... I never understood why some posts and other comments say to disconnect once its charged. Who knows? Until there is empirical data showing negative effects of leaving chargers plugged in, I guess we are good to do it. Fair enough.
    Last edited by s2mikey; 10-17-2011 at 09:55 AM.

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    I think it's because the Apple charger is 'intelligent' and switches off when the battery is fully charged. Yes - you're right - to continue to charge a fully charged battery is certainly not good for it. So, if you were charging with a 'dumb' charger, this would - most certainly - damage the battery.

    So - we're both right!!....

    Tim


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