Hi again!,

Went for the distance today.
On assisted pedaling mode, and keeping the speed at about 20 mph, my batteries lasted for 11 miles. I could have squeezed a couple more miles out of them, but by then, the top speed, no pedaling, was only 18 mph, against the 22 mph I get from them when freshly topped off.

Equipment:
Old Mongoose/Currie bicycle
2 12v, 12ah batteries
16 teeth freewheel (for the motor)