Casio CZ/ VZ/ FZ - Pro Series

Heyo,

I've been using my CZ-1000 for years now, and it's serviced me well.

However, recently the power jack has been acting a bit tempermental; 
it's a little touchy now. Not good. I was wondering if anybody else had 
similar problems, and if so, what had they done?

Also (and I understand this might be a bit of a stretch), but I 
recently acquired a Korg Poly-800. It's similar to the CZ-1000, but 
it's got a dedicated 3V watch battery inside, keeping the patches even 
when it's unplugged and there are no C or D cells in back.

Is anything like this possible with the CZ-1000? I've scoured the web, 
but I couldn't find anything. What do you guys think? It'd make me love 
my CZ-1000 even more.

Chris