I have a 3G, and its battery is draining a full percent every 30 seconds. I have changed battery (twice) but still nothing changed. Do you guys have any idea what could be the cause of this? I am expecting heat damage to one of the chips because for a while I overclocked my phone in the days where software overclock (un-underclock actually) possible. And I used mywi to distribute its 3G signal to the house where there was 4 or 5 concurrent devices using it for two weeks. After five or so minutes phone cut off charging because of overheating and only way I was able to use it was to put it inside the air conditioner. (First I tried the fridge, but apparently the fridge is quite an effective faraday cage - almost no signal could escape, so I opted for the A/C.) The phone works fine, but the only problem is rapid battery discharge. Do you have any idea what did go wrong? Which chip I should replace if it's a chip failure (Power IC?) - or if it's a shortcut where should I look for it? This is not my main phone anymore (got an iPhone 4) so I'm open to experimentation, but I would like to give it to my mom if I can make this a working device. Thanks for all the recommendations.