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2pin (USA) and 3pin (UK) Charger: Charging time differences. Need help.

912 Views 3 Replies Latest reply: Jul 13, 2012 4:19 PM by GZukes RSS
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Jul 12, 2012 12:28 PM

I had my iPhone 3Gs imported from USA. It is unlocked from AT&T, but thats not the point. I got the Apple original 2pin charger with it.

Now, I have recently got a new iPhone 4, imported from UK. It comes it an original Apple 3pin charger, as common in UK.


In my country, I can use both types of chargers. As far as I know, both supply the same amount of power. The thing is: my iPhone 4 (3pin) charger takes around 5hours to charge my phone from 10-100%. The battery lasts for a day at most. Now if I use my 3Gs charger (2pin) with my iPhone 4, it charges incredibly fast. From 10-100%, it takes an hour and a half at most. The battery lasts for a day with this charger as well.


Now, my question: is there any difference in the amount of power supplied from both chargers? Will using the 2pin (original) charger with my iPhone 4 somewhat damage it? Like excess current short circuiting the internal power supply or whatnot? Because I like the battery to get charged quickly, but I cant risk short circuiting it (there's no Apple Store around my place for miles, so I cant take my iPhone to one in case I damage it.)


Experts please help. Thanks.

iPhone 4, iOS 5.1.1, 16GB
  • GZukes Level 4 Level 4 (1,565 points)

    The 3 pin charger may not be putting out the power it should.  An iPhone 4 should charge (0-100%) in about just over 2 hours to 3 hours.

  • GZukes Level 4 Level 4 (1,565 points)

    A charging time of about an hour and a half to go from 10-100% doesn't seem to be unreasonable.  My figures are based on using the iPhone charger.  Using an iPad charger will charge the battery quicker, but I have not done any time testing using my iPad charger.  This is because the iPad charger can put out 2.1 amps as opposed to the iPhone charger that puts out 1 amp.  Using a charger that puts out more amps than required shouldn't hurt your iPhone since the iPhone should limit the amount of amps it draws.


    5 hours to charge your iPhone seems slow.  Does the 3 pin charger say it outputs 5v, 1 amp?


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