I`m not sure how important the battery pack-up is ? Maybe if you just make sure that all your important "settings" and "song-files" are on floppies then I think you should be all set. IMO one of the reasons they put those batteries in things "electronic" , I think , is because we (me included) don`t always back-up when we should. As far as doing and "real damage" to the KB, I think that is unlikely.
Anyway , to change the subject , is your computer "OK" ? It`s weird every now and then I get these e-mails (not from you) that have these huge attachments that and I don`t have a "clue" as to how I get then !! So much for "privacy on the web" !!
Take care and best of luck