DIY repair work (back-case and battery)

Discussion in 'iPhone' started by bobgorila, Sep 4, 2009.

  1. bobgorila macrumors member


    Apr 21, 2009
    There's a pretty big crack down the back of my black 3G and its battery life is appalling. It's out of warranty now, so I'm thinking about doing a little DIY to replace the battery and, while it's open, put a new back-case on.

    I'm no novice: I've replaced a cracked and damaged LCD on a 2G iPhone before, and disassembled/reassembled loads of Macs working for an Apple authorised repair centre, so I'm fairly confident in my ability to follow a good teardown guide.

    It's just, the actual sources for these parts look pretty dodgy...

    I'm seeing a lot of batteries on eBay and such rated at many more mAh than the built in one. Some as high as 1800mAh, like this one. Is there a catch? Do these seemingly dirt-cheap replacement batteries actually last longer than a brand new 1130mAh battery that comes in a 3G? Or is their half-life poor? Or are they prone to exploding? I have no idea, it just seems like there should be a catch.

    And cases too. Should I expect a casing like this that doesn't explicitly state being an official Apple part to be an imitation? Would it actually be any worse for being such?

    It all seems a little suspect, so I guess I'm basically wondering if anyone here has had positive experiences with buying and fitting spare parts like these?
  2. abijnk macrumors 68040


    Oct 15, 2007
    Los Angeles, CA
    Not sure about the specific parts you posted, but another forum member recently had good success with a replacement back from ecaseshop.

    You can see his results here.
  3. Coukos34 macrumors 6502

    Mar 20, 2009
    Just to let you know, I recently had to replace my internal dock connector (water damage) and I bought a 1600mAh battery cause i figured i might as well upgrade the battery while im doing it. The battery was of poor quality visually and after putting everything back together, I noticed after the first charge it was having problems charging again. After a few days it eventually quit charging altogether. I went back to my original and has been working fine now. What I noticed after comparing batteries, is that the battery also has a small pcb with transistors and such, and the quality of that alone was huge. I think that was what made my battery fail. The failed battery was super cheap and
    I wont make that mistake again. I would use genuine parts if possible. less headaches. If you go with an extended battery I would do some research and find one that is quality. Even the first dock connector I was sent was faulty, the mic on it it didnt even work!
  4. bobgorila thread starter macrumors member


    Apr 21, 2009
    thanks for the recommendation - I've ordered a bright orange back-case on a whim (£15 inc airmail, which isn't bad).

    I'm still open to battery suggestions, since it seems like a veritable minefield of suspect merchandise.

    Oh, and the home button has started requiring a much more deliberate press to actually register, I'm going to have a look at the housing and see if there's anything obvious when I change the back-case, but if anybody has some past experience that might be handy?
  5. iphone3048 macrumors member

    Aug 13, 2009
    "more mAh than the built in one. Some as high as 1800mAh"

    I believe those are FAKE big time. In order for a battery to have a bigger capacity it has to be LONGER or WIDER or THICKER. Those batteries are neither! The inside of the iPhone does NOT have room for a longer or wider battery. It does have room for a thicker battery, BUT, just very very very little room for that. They cannot produce a 1800mah battery for the iPhone, no way no how.

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