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How can I tell if it's my battery or my charger that needs replacing?

1082 Views 3 Replies Latest reply: Jun 30, 2013 6:23 PM by Lawrence Finch RSS
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Jun 30, 2013 5:15 PM

My iPhone 4s stopped charging two days ago while staying at someone's beach condo. The battery began charging slowly and then just quit charging. The phone won't charge with my charger now. The screen is black. If I push the on/off button for a few seconds, it shows a plug and a battery with a little bit of red, and it flashes the red twice. Then the screen turns black again. I'm wondering if I need a new charger or a new battery. My HP laptop also stopped charging while at the condo - It will only charge up to 5% with my laptop charger. I have never had this problem before so I'm thinking there was some kind of electrical surge from the outlets during the storm that occurred while staying in the condo. I wasn't using surge protectors. My phone was backed up until the day we went on vacation, but I really want the vacation pictures off of the phone. Do you think it's the charger or the battery? What's the best way to get a battery at a decent cost if the battery is the problem? Thanks!

iPhone 4S
  • ComputerFixer Level 3 Level 3 (720 points)

    When two devices quit working at the same time, I would put blame on the charger.  If you want a definitive answer, you can take it to a genius bar to have the battery and the iphone tested.  You could also do a test yourself by finding another USB charger (i use a 1.1A usb charger for mine) and see if it works with a different charger.

  • Lawrence Finch Level 7 Level 7 (24,600 points)

    An iPod or iPad charger can be used to charge an iPhone. Are you referring to the charger or the cable, however?


    A late model Macbook (2011 or later) should be able to charge an iPhone fully if the iPhone is the only USB device connected, as it can supply 1 amp, which is the maximum the iPhone needs.


    If it doesn't charge try a different cable (except for a pre-2008 iPod cable, which was Firewire rather than USB), and inspect the connector on the bottom of the phone for dirt or damage. Use a magnifying glass, and clean it with a wood or plastic toothpick or a dry toothbrush.


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