Two new batteries now installed, charged and tested.
Wow, what a difference this has made. Took a glide over approximately 12km and used only 3bars of charge. Average speed for the journey 9.5 km/hr with frequent speeds around 14-18km/hr on clear flat up to 2 deg + &- slopes. Running tyre pressures on X2 configured i2 @ 4 psi.
My Segway is now better than new and lots of fun again.