20 - 30 minutos
Crash at ~30% batt, CRC ERR panic
Went pretty well. However, the most tricky part was getting the logic board BACK in place. Some funniness near the power on/off switch. Full video @ http://bit.ly/vvvFsn
Buy the #00 and spudger BESIDES the ones which come in the package. The in-package spudger broke (not in trying to get the battery out) and the separate #00 screwdriver was a bit more… precision. Oh, and use a business-card (refrigerator) magnet to hold screws. Thirdly, put an X on your bad battery. So you don't mix it up with the new one- I almost reinstalled the old battery.
iPhone 3GS Replacement Battery
Phillips #00 Screwdriver