In article , Uncle Marvo
writes

... so you can return to it with the battery nice and flat?



No I believe there's a separate battery in the back especially for the
heater, think it's charged when the engine is running.

I guess it must be cold getting off a train at night in Sweden and
driving home!
--
Janet Tweedy
Dalmatian Telegraph
http://www.lancedal.demon.co.uk