Hi, thanks for the reply. Unfortunately I don't have any grandchildren to do it for me!
I sorted out the CD tracks problem by using Google to find and download a music file converter, I don't really understand what I am doing, but never mind it worked.
The battery icon on my 18c is not in any segments that I can see, but while waiting for a reply I discovered the yellow colour started changing to black as I used it. So, when I asked the question, it must already have been fully charged and then started to lose the charge over time. Wouldn't you think the manufacturers would put in the instructions how long it takes to charge? I still don't know the answer to that, I'll have to find out by trial and error.
P.S. No, there is no indication that the battery is charging or is fully charged while it is connected to the computer, just the "tube map" (maybe meant to be electrical connections?). That wasn't changing at all, but at least I know now that when I disconnect, if the battery icon is yellow, it is charged.