Wow WTK, you sure provided a lot of information!

I'll continue to use a 7AH motorcycle battery with the RS RR.  Been working fine for me now for over 2 years.  I don't have to worry about charging batteries or being caught at night with a dead battery.  Some of our night rides we'll leave near dark and come back LATE in the night.  This is at least 2 hours of ride time.