Accu settings menu functions?

[ve7it]

I have been running the 1.0 version and have a few questions. I have been unable to find any documentation on the function or usefulness of the Accu menu item. It appears to be used to somehow calibrate the battery voltage monitor and set limits for the percent of battery available display.
Any sequence of buttons I tried seemed to make my battery display worse. Perhaps someone in the know could comment on how to use the menu contents. It seems like this menu could be removed and the 3 values set as config parameters. For most builds, use of a standard lipo cell seems to be the norm and the dual 10k voltage divider pretty much define the numbers to be used. The a/d counts per volt is needed to scale display to volts and the battery voltage range is useful for estimating the percentage of battery remaining.