On Wed, 06 Feb 2013 21:01:37 +0000, polygonum
wrote:

You do indeed use up stored energy when stood in traffic - if you wish
to keep warm in the winter.

Catalytic pocket warmers, in a pair of chinos and all over the body
warmer.
Be a bit bulky, of course.
Having suffered in trucks, vans and cars with defective or missing
heaters, I've no envy of those who choose to run an electric car in
the winter.
At least on a bike you're exercising and on a motorcycle you don't
notice it too much if you're dressed for it. The odd thing about being
in a heaterless car is you really feel it.