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Can use ipad charger to charge iphone?

493733 Views 342 Replies Latest reply: Sep 10, 2013 3:00 PM by ronhenderson2 RSS Branched to a new discussion.
  • gamontecarlo Level 1 Level 1 (5 points)
    Currently Being Moderated
    Sep 28, 2012 6:31 PM (in response to emfung)

    Well, having tried that for a month or so:

    The iPad charger kills your iPhone battery.

     

    If hook up the iPhone to the iPad charger, the battery inside gets quite hot while charging, which is the cause of the limited capacity of the battery. Meanwhile the proper iPhone charger doesn't rise the temperate of the phone at all for me.

     

    I'm trying now whether charging the iPhone with it's charger restored some capacity, but I think the heat pretty much irreversibly killed it.

  • gamontecarlo Level 1 Level 1 (5 points)
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    Sep 28, 2012 6:35 PM (in response to emfung)

    Well, having tried that for a month or so:

    The iPad charger kills your iPhone battery.

     

    If you hook up the iPhone to the iPad charger, the battery inside gets quite hot while charging, which is the cause of the battery's capacity decrease. Meanwhile the proper iPhone charger doesn't rise the temperate of the phone for me at all.

     

    I'm trying whether charging the iPhone with it's original charger restores some capacity, but I guess the heat pretty much killed it irreversibly.

  • SympatheticDissenter Level 1 Level 1 (0 points)
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    Sep 28, 2012 7:10 PM (in response to merlin1128)

    I've read through your subsequent posts but I'm going to post here because of your arrogance when you are clearly wrong. All lithium ion (or LiPoly) batteries use smart chargers which vary current and voltage dependant on the state of charge of the batteries. They can charge batteries with lower capacities because of their adaptive nature without problem and there is no reason why they should shorten battery life.

     

    I am quite frankly uninterested in answering any of your puerile electrical engineering questions to rove a point so please don't bother trying to prove an incorrect point by asking any.

  • nromo22 Level 1 Level 1 (0 points)
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    Sep 30, 2012 6:25 AM (in response to merlin1128)

    Lawrence Finch - Level 6 (13,705 points)

     

    merlin1128 - Level 1 (0 points)

     

    #scoreboard

  • soldit2u Level 1 Level 1 (0 points)
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    Oct 6, 2012 4:11 AM (in response to gamontecarlo)

    Me too.

     

    Couple of months bsck I bought the latest iPad - I use the iPad charger with my iPhone 4S as it's by my bed.

     

    My iPhone charges in 30 mins to full?

     

    I get out of the shower in the morning and the 100% charge is 80% - within the hour it's down to 60%.

     

    It's flat on no time. Back in the charger for 15 mins - back up to 100%.

     

    My battery is stuffed.

     

    On the other side of the bed, my wife has the same phone, bought the same day - her phone lasts all day.

  • dantheman2 Level 1 Level 1 (0 points)
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    Oct 31, 2012 4:21 AM (in response to soldit2u)

    I agree with Mr. Finch.  The iphone may charge up faster, but the iphone will not use more current than a max amount.  The iphone is nothing but a fancy resistor.

     

    Ohm's law Amperes = Voltage/Resistance.  The amount of resistence (unknown) and voltage (5v) is not going to change.  Do the math.  The current will only go so high. 

     

    The only way it would be a problem would be if the resistence is so low (close to 0) that the circuit becomes a short.  Then it wouldn't matter if you are using the iphone charger or the ipad charger, both would overheat and destroy themselves.  So if the iphone charger does not overheat (can supply enough current), then the ipad charger will have no problem supplying enough current.  Even if you have a 5000000 Watt charger, at a fixed 5 volts , the current will never go above a certain level.

     

    The problem that you can run into is the reverse which is to use the iphone charger to charge the ipad.  The iphone charger can't supply enough current and can overheat and melt itself.  

  • soldit2u Level 1 Level 1 (0 points)
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    Oct 31, 2012 2:18 PM (in response to dantheman2)

    I agree with Mr. Finch.  The iphone may charge up faster, but the iphone will not use more current than a max amount.  The iphone is nothing but a fancy resistor.

     

    I agree also - but my previous post it also a fact.

     

    I think this is my third post ever? I'm a very busy person, so making a post for the fun of it, isn't going to happen.

     

    Months have passed since I've been using the iPad charger with my iPhone 4S - My battery is at 50% after 3 hours, with no calls made - just checking emails and a few texts.

     

    My wife's is at 80% at the same time/usage.

     

    Regardless of the amps/volts/current debate - there is hard evidence that...

     

    "Fast Charging" of the iPhone 4S with the new iPad charger is NOT good for the battery.

     


  • Lawrence Finch Level 7 Level 7 (24,420 points)
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    Oct 31, 2012 2:21 PM (in response to soldit2u)

    Well, Apple disagrees with you, as they say the iPad charger is compatible, but I, happy to hear that you know more than the manufacturer.

  • soldit2u Level 1 Level 1 (0 points)
    Currently Being Moderated
    Oct 31, 2012 2:34 PM (in response to Lawrence Finch)

    Mate, as per the previous post - I'm time-poor, so I'm not going to be "baited" by your comments.

     

    I stated the facts from my usage of the phones/chargers etc.

     

    Simple. Nothing more.

     

    Whether you, or Apple agree - is as irrelevant as your post.

  • nromo22 Level 1 Level 1 (0 points)
    Currently Being Moderated
    Oct 31, 2012 2:39 PM (in response to soldit2u)

    " I'm not going to be "baited" by your comments."

     

    all evidence to the contrary ..

     

    save ur breath, Lawrence .. & stay dry!

  • modular747 Level 6 Level 6 (15,675 points)
    Currently Being Moderated
    Oct 31, 2012 11:36 PM (in response to soldit2u)
    Whether you, or Apple agree - is as irrelevant as your post.

     

    The only thing irrelevant is your post, stating unsubstantiated, erroneous and uninformed claims.  The maximum charging rate and maximum battery is determined entirely by the charging circuitry in the phone itself - the charger has no control other than supplying the current required.

     

    If your battery life is poor, the problem is in the phone.  Unless you have a defective iPad charger supplying grossly excessive voltage, what you say defies all known laws of physics.  Your ignorant and irrational belief systems have no value to anyone.

  • soldit2u Level 1 Level 1 (0 points)
    Currently Being Moderated
    Nov 1, 2012 12:00 AM (in response to modular747)

    The only thing irrelevant is your post...

     

    Seriously?

     

    The Topic:

     

    Can use ipad charger to charge iphone?

     

    Irrelevant meaning:

     

    Totally unrelated to the matter being considered.

     

    Consider yourself educated.

     

    I wonder...If I cut you in half modular747 - would I find seeds?

     

    Also...

     

    what you say defies all known laws of physics

     

    Chill out dude! It happened - or I wouldn't have posted it... jeeze...

     


    Your ignorant and irrational belief systems have no value to anyone.

     

    I was just posting what happened to my bloody phone man? BELIEFS? You need to relax and get outdoors a bit..

  • modular747 Level 6 Level 6 (15,675 points)
    Currently Being Moderated
    Nov 1, 2012 12:35 AM (in response to soldit2u)

    I was just posting what happened to my bloody phone man?


    Chill out dude! It happened - or I wouldn't have posted it... jeeze...

    "Dude", you have no clue how to interperate what "happened" - yet you do, only to make youself out as ignoranat or cognatively challanged. As to what you would find if you cut me open, I'm certain you couldn't cut your own way out of a paper bag.  

    You need to relax and get outdoors a bit..

    Is that the best troll cliche put down you can come up with?   

    Irrelevant meaning:

    You post is irrelevant since it's based on erroneous conclusions, and poor observation. Knowing the definition didn't stops you from calling "irrlelevant" an obviously relevant and accurate statement by Laurence Finch.

  • Zerotogo Level 1 Level 1 (0 points)
    Currently Being Moderated
    Nov 1, 2012 2:04 PM (in response to soldit2u)

    It looks like merlin1128 changed his name to soldit2u LOL!! Funny stuff, bro!!!

  • Knert88 Level 1 Level 1 (0 points)
    Currently Being Moderated
    Nov 7, 2012 3:13 PM (in response to gamontecarlo)

    gamontecarlo wrote:

     

    Well, having tried that for a month or so:

    The iPad charger kills your iPhone battery.

     

    If you hook up the iPhone to the iPad charger, the battery inside gets quite hot while charging, which is the cause of the battery's capacity decrease. Meanwhile the proper iPhone charger doesn't rise the temperate of the phone for me at all.

     

    I'm trying whether charging the iPhone with it's original charger restores some capacity, but I guess the heat pretty much killed it irreversibly.

     

    This is correct, the iPad charger might kill the iPhone battery, not directly by current, but the heat it generates while charging. My girlfriend used the iPad charger after she lost her iPhone charger, and now it's almost useless, after just a few weeks..

     

    Quiz: Does 5W generate more or less heat than 10W?

     

    If the iPhone gets hotter with the iPad charger, well my friends, then it draws more current or by some other reason produces more wattage. End of story.

    And as we know, heat seriously degrades Li-Ion battery life.

     

    So even if Apple says the chargers are compatible with multiple products, I would not recommend it in the long run, it's not worth the risk.

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