Though this site (below) for discussion doesn't have a specific forum about Quickies, you may be able to find someone who has helpful info.:

http://www.wheelchairjunkie.com/cgi-bin/ultimatebb.cgi

This is the site's front page, in case you also might want to check it out .

http://www.wheelchairjunkie.com/

This is another forum "Accessibilty discussion that is not related to the web. Software, physical access, transport, education etc....":

http://www.accessifyforum.com/forum8/

I'm sorry that I don't have more info. about your powerchair... I use a manual and a scooter, which doesn't make any noise when its battery is charging.