"Tim.." wrote in message
...
Unless there was some other reason why the battery was 3/4 discharged or
you
had some other load on (igntion and hence other stuff powered up) then
your
battery is duff. Check the water level (if poss) and recharge off the car
over night at 3-4amps. Then have it drop tested. Bet you have a failed
cell.

Had the battery tested today - its fine.
Here's where I have to admit to forgetting that Volvos (my new used car)
automatically have the sidelights on when the ignition key is in the 'on'
position. What a plonker! Even so, I am still surprised the battery went
flat.