i guess these ones will do

http://cgi.ebay.com/5-CAPACITORS-560...QQcmdZViewItem

Your link isn't working for me, but those high voltage caps are used where there is higher voltage, but higher capacitance isn't needed.

so like for a 14 cell setup (24volts?), and i plug in an 80v capacitor then the capacitor won't get charge because of too much resistance?
hmmm *looks for capacitor faqs*

An 80v, 5600uf capacitor would be GIGANTIC (your 2nd ebay link isn't working, and I didn't see it before). All you need is something with about twice the voltage of what you will be running. 14 cells are about 16.8v. This is where I got the 35v capacitor idea from.

Too high of voltage won't affect the charge much. You don't need to worry about that.