Here is an update on my sick tangerine iBook.
1) I have been in the habit of using the power cord with my computer, rarely running it off the battery.
2) Most days I'd walk to the local public library to use their WiFi for job searching. I'd take both my iBook and power cord with me.
3) A few months ago I slipped and fell, and my iBook was slammed against a cement sidewalk. The laptop continued to work, so I thought it was okay.
4) When I started having trouble with the battery draining while my iBook was plugged into the power cord I took my tangerine iBook to a computer repair person. She told me that my motherboard was damaged, and repairing the damage would cost a fortune. I don't recall all the proper terms, but there is a connection that isn't as it should be.
If my "best" power cord is plugged in all the way, and then slightly pulled out, the battery will charge. If the power cord is moved at all the connection is broken. I was told to only plug the power cord in while the battery is charging, and I'm not to use the computer, or move it it around, when charging the battery. I am to run the iBook off the battery, and not have the power cord in when the iBook is turned off.
I'm told that, with the exception of a nasty damaged motherboard, my tangerine iBook is in great shape.
So it does not appear that my tangerine iBook will ever be usable for all day writing bouts -- usage is limited to how long the battery charge lasts.
I have a graphite iBook that I had used as my "writing" computer. It has no airport card, and won't hold a battery charge, but it runs off a power cord, and can be used all day. Awhile ago one section of the keyboard stopped working. In a what-can-it-hurt move I removed the graphite iBook's keyboard, sprayed it from all angles with canned air, reinstalled it, and it's now working. So I'll use the graphite iBook as my long-project computer, and only use my tangerine iBook for internet use.