Simple and Straightforward iPhone 3G Battery Replacement
I had this old iPhone 3G from a friend and have been using it for 2 years until it couldn't hold a single charge for a day while in sleep mode. I was in the mood of looking up a replacement but stumbled upon this site. So I clinched my teeth and made the purchase.
Thanks to the guide, not only I was able to replace the battery but also disassemble parts and clean them thoroughly. On final note, I am anticipating on longer battery life for my good 'ol iPhone. Yehawww from Texas. :D
Just make sure to read the instruction for iPhone 3G battery placement guide thoroughly and comprehend the context within the repair instruction. Most faulty fixes are due to our stubbornness and not following instruction correctly.