Disconnecting the battery resets the Trips, don't you know?

Long drive yesterday from Canberra to Sydney return (about 550 km). On the return, the fuel beep happened at 656.4 km according to Trip A, even though CONS was 4.0 LHK (4.3 LHK corrected). (That's 408 miles at 55 mpg US)
At 725km I filled 39.53 l (10.4 gal US). I was a bit confused when I found my last odometer reading, until I calculated that I had driven 901 km (560 miles), not 725km.

D'oh! When I took my battery out for a recondition charge, detox and chakra realignment, it must have reset the Trip meters. My wife drove the car from then until yesterday, so I didn't notice. What a relief the DTE is so conservative.