[Ducati] Re: Batteries

[Robert Cardinaux]

For those of is electrically challenged and unable to find a listing for 
batteries suited to a Vintage Single, who can tell me how to select a 
battery?  My bike has an updated 12-volt system using traditional points 
(stock was 6V).

Here are a few of my questions:
What amperage Amps/Hour rating should I look for?
Is there a link anyone knows that cross-references volts and amperage to 
physical dimensios?
Is maintenance-free better, or just more expensive?

Thanks in advance
Robert