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Any Way To Confirm If My Daughter's iPhone Needs A New Battery Before I Buy One?

Discussion in 'Apple Hardware' started by Meths, Jan 14, 2020.

  1. Meths

    Mobster

    Joined: Mar 12, 2005

    Posts: 3,860

    For a couple of days my daughter's 6s has been stuck in a restart loop.

    It tries to boot up, gets to the white screen with the apple logo, screen goes black and then it cuts off to try again. I can't restore it either normally or by DFU and am getting the old iTunes error 21. I've also tried all combinations of home button/power button/volume button but no joy.

    She mentioned it wasn't charging properly a few weeks back but when I tried it with a different cable it seemed to be fine so I thought it was something she was doing. Now I'm thinking that the phone is trying to power on but can't draw enough power from the battery as it's loading the OS and that's causing it to cut out.

    As I type this I'm convincing myself it's the battery but is there any way to test it before I spend £20 on the kit?

    I suspect not but just thought I'd ask.
     
  2. mulpsmebeauty

    Mobster

    Joined: Apr 25, 2007

    Posts: 3,841

    See if an Apple store will give you a diagnosis. You shouldn't be obliged to give them the work afterwards.
     
  3. Alpherah

    Sgarrista

    Joined: Jun 24, 2008

    Posts: 7,978

    If the phone is apple logo boot looping, and gives an unknown error when trying to restore, it’s more likely to be a failed Tristar/ PWMC rather then battery. The fact it wasn’t charging properly is the giveaway symptom
     
  4. Meths

    Mobster

    Joined: Mar 12, 2005

    Posts: 3,860

    Would a faulty tristar still allow it to take some charge when plugged in e.g. If the battery is completely dead and I plug the charger in for half an hour, it starts trying to turn on again and once the charger is removed its keeps going until the battery goes flat again?
     
  5. Alpherah

    Sgarrista

    Joined: Jun 24, 2008

    Posts: 7,978

    Can do, depends how knackered it is