OK now you have me confused about the one bank is it gonna hurt the batt or not ?
as far as the new and old batt the batts i have now are less than a month old got 5 trips on them...
my charger is a 15 amp is it really gonna take that long it takes about 2 1/2 hrs to fully charge from dead with just so i was figuring about 5 or 5 1/2 to do two...

thanks again guys.