Since the process takes only a few hours...
I usually agree totally with Bill, but on this point, not so much.
Equalizing batteries properly
is a relatively long and detail oriented process. The batteries (FLA) are kept at the elevated voltage with a relatively low current
flow and specific gravity (SG) readings are taken for each cell every half hour. These reading are then compared, and outliers are watched carefully to see how they settle out. The equalizing process is complete when two or three consecutive sets of SG readings show a change < 1 or 2 points.
You should not push the equalization
button and spend the rest of the afternoon at the tiki bar! ;-)
Hope this helps.