Quickset - Specify custom charge limits?

Hi,

I just installed Dell Quickset and enabled desktop mode. I'd like to modify the upper charge limit to something other than 100%; for example, I'd like the battery to only charge to, say, 80% full, or 90% full.

I don't see any way of achieving this through the quickset gui. Is there any other way I could do this? Some .ini file I could edit or some other tweak? Or maybe a registry edit?

Thanks in advance!

G