Battery was bulging so much it forced the touch pad up to where the case would not close. Not to mention the short battery life (7 year old battery).
Fine. Didn't even use any instructions, just the tools in the included tool kit.
This particular repair is dirt simple if you just slow down and study what is in front of you. No instructions even necessary. Unscrew a few screws, unplug and remove the old battery, plug in the new battery, re-install the screws, plug the computer into the power cable, and fire it up. That's it.