I just replaced my iPhone 3G battery. Yes, it is possible don't believe those who say it's not, it took about 45 minutes, but I ended up opening it 3 times, first for the battery, next to sort out GPS, then to get the home button working. I was wondering if I need to do anything to teach the iPhone that it now has a new, higher capacity battery. After installing it it got about a 95% charge, unplugged used, (probably not ideal, I know, but LiOn batteries don't need babying like older batteries) then a full overnight charge. I am now going to let it run completely flat before giving it a full charge. Is there anything else I can do?