Hi, The battery on my 3G iPhone is dying. I want to follow the iFixIt guide to install a new battery... http://www.ifixit.com/Guide/Repair/Installing-iPhone-3G-Battery/577/1 What battery do you guys recommend I replace the old one with? Where can I get it? I'm looking for a battery that'll last me at least a year without any headaches. Thanks for your help. -Sri.