Great guide, thanks. However, after step 5 I managed to take off the battery and put a new one in without unplugging anything except the board connector. You must be super careful and take your time, but this works very well; you can bend up toe board sufficiently far once the glue is off the battery, then it works without much danger to break some of the tiny parts. If you put back in the new battery be aware the magnet will attract it, so take care and secure it well.