Wow! You learn something every day.
During the last week I've had problems with my PC which I cured by changing the 6 year old battery and as Bill Norrie pointed out this is relatively easy compared to the details mentioned here. Until now, I didn't know any of the concerns with batteries in the keyboards/organs and frankly, even if I knew where to start, I don't think I would have the nerve to try it. "Every man to his trade" as the saying goes and I am sure I would have to call in an expert.
It is all very interesting though.
Audrey