Last time I enquired at Battery World they didn't have a Yu-Fit device:
http://www.centurybatteries.com.au/resources/yu-fit
but since then they have aquired one.
I was told Yu-Fit is for idle stop start systems only and the Mondeo did not require a BMS reset when the battery is renewed.
Meanwhile Forscan tells me the battery I changed about a year ago is about 6 years old (2200 odd days), which is the age of the car.
On the trip today the zetec's charging voltage suddenly started going up and down as previously noticed, downhill 14.8, uphill 14.4, whereas for the previous 60km it remained steady at various voltages from 14.8 to 14.4.
It takes a few seconds after starting engine for volts to go up as per NZ XR6.