Safe to charge iPhone4S with?

Discussion in 'iPhone' started by HeySamantha, Mar 24, 2012.

  1. HeySamantha macrumors member

    Mar 15, 2012
    I just got an iPad 3 and I know that you can't charge the iPad with the iPhone charger (you can, it's just REALLY slow)... so would it be safe for the iPhone4S to be charged with the iPad 3 charger?
  2. insimbi macrumors 6502


    Mar 27, 2008
    Yep, works just fine for the iPhone 4S. :)
  3. HeySamantha thread starter macrumors member

    Mar 15, 2012
    perfect, thanks. I figured as much.. I was just worried about maybe burning the out or something? Only because I know the iPad 3 has a much more powerful charger.
  4. Macgeeza macrumors regular

    May 18, 2010
    I wouldn't recommend it, it's a more powerful charger. It will probably charge the iPhone quicker but might make the battery hotter than normal.

    Long term, might affect the life span of the battery.

    It's better for any battery to be charged slower and keeping cooler.

    Why not just use the charger for each specific device, the way apple designed it?. Is that tiny iPhone charger really going to take up that much more space in a bag?. (if that is the reason why you only want to use one charger)
  5. AllieNeko macrumors 65816

    Sep 25, 2003
    That's not exactly how electricity works, just because the iPad charger has more current available doesn't mean the iPhone will draw it! Just think how much current is available from your wall socket...

    The opposite COULD happen, the iPad burning out an iPhone charger by drawing too much current (or an iPhone burning out a normal USB port...). But thankfully, they make iPads (and iPhones) smart enough not to draw more current than they KNOW the device they're attached to can handle.
  6. gadget123 macrumors 68000

    Apr 17, 2011
    United Kingdom
    You can charge it with the big charger but if you want that bit comes off anyway so you could use it as a normal Iphone charger.

    I actually change my phone mostly via the PC and UBS.
  7. dsquared81 macrumors 6502

    Apr 11, 2010
    Orange County
  8. HeySamantha thread starter macrumors member

    Mar 15, 2012
    I have 2 plugs and 3 apple products... Macbook Pro, iPhone4S and iPad 3. That's my main reason for asking, tbh.
  9. Macgeeza macrumors regular

    May 18, 2010
    So why does the iPhone charge faster when using the iPad charger?, it must be getting a higher current.
  10. Diseal3 macrumors 65816

    Jun 29, 2008
    Well this is probably because the iPad charger is able to supply more current. The iPhone still has a theoretical limit as to how much it can draw before it does cause an issue.
  11. insimbi macrumors 6502


    Mar 27, 2008
    The iPad charger is 10W & the iPhone charger is 5W, so it will charge faster, but not overcharge.
  12. PhoenixMac macrumors 65816

    Mar 7, 2010
    take a look at the plugbug, attaches to your macbook charger to give you an ipad charger so you can charge both at the same time with 1 outlet.
  13. mbell1975 macrumors 6502a

    Mar 17, 2012
    I never realized they were different chargers. I have been charging my iPhone with my iPad charger since I got it last week. Never even took the iPhone charger out of the box. I did notice how fast it charged, thought that was just the iPhone having a way smaller battery. I leave it plugged in overnight too, hmmm
  14. JForestZ34 macrumors 6502a

    Nov 18, 2007
    I've charge my 4S a couple of times with my ipad charger and my phone doesn't get warm. I do notice that it does charge faster. Never had a problem though..

  15. scaredpoet macrumors 604


    Apr 6, 2007
    The iPhone will only take the amount of current it can safely accept. Just because the iPhone charger doesn't supply the higher current doesn't meant the iPhone 4S can't accept it.

    The iPhone charger is made the way it is (providing a lower current) mainly so that it can be really small to fit in the box, and so it can be cheaper to mass produce. Not because that's all the current the iPhone can take.
  16. 3bs macrumors 603


    May 20, 2011
    Dublin, Ireland
    If only they made international plugs. Their website says they will early this year which has already passed?
  17. takeshi74 macrumors 601

    Feb 9, 2011
    Why not read up on this? It's discussed in countless prior threads. The device will only draw what it needs. No negative impact. Don't assume -- especially if you're trying to give advice.

    Nope. The device cannot draw more current than the charger supplies.
  18. cynics macrumors G4

    Jan 8, 2012
    That is true but keeping a battery cooler over the course of its life is technically better for it.

    One could argue that the iPhone charging at its max vs the oem charger is more harmful. I notice a temperature and speed difference of charging using my 2amp car charger vs the oem charger.

    How much it will effect it I don't know nor do I care. I would assume any difference in longevity would be minute or else apple would advice against doing it.
  19. AllieNeko macrumors 65816

    Sep 25, 2003
    Yay for selective quoting to make me sound wrong. Read what people write. I clearly said there was intelligence in the device to detect the rated output of the charger to avoid damaging a charger. Only in a shorted cable or a cable designed to trick the device into drawing higher current (they're available) can a charger or computer get damaged from overload.
  20. HeySamantha thread starter macrumors member

    Mar 15, 2012
    oh damn, that's awesome! I'll have to order one of those in the near future! Until then, I need to pay off some of my ipad haha

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