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The first model of iPhone, Model A1203 with 4, 8, or 16 GB capacity and an aluminum back. Repair requires a significant amount of prying, and may require some soldering. This page aims to help users troubleshoot, fix, and seek help for the iPhone 2G.

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Why doesn't my new battery work?

I went through the instructions. Getting the case off was difficult. De-soldering and re-soldering the battery went smoothly.

After re-assembly, I put the iPhone 1st gen into a dock to charge. It simply flashes the start screen (apple on black background) -- about 5 seconds on and 2 seconds off.

Perhaps the soldering wasn't perfect? Perhaps there's some other physical problem?

Answer this question I have this problem too

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I have the same problem. I checked the new battery voltage and it is only .245Mv, therefore, I think it's a bad replacement battery. The old battery shows 3.79V. So, I think I will try putting the old battery back into the phone and check again.

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+ sounds like a good plan to check voltage of batteries

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Yes, it was just a bad battery. ifixit quickly sent a replacement and the new battery worked fine.

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just check you haven't got the solder spots too close and a shorting iphone

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andrewvoelker will be eternally grateful.
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