On 14/12/2020 17:58, John Walliker wrote:
On Monday, 14 December 2020 at 17:52:10 UTC, Kellerman wrote:

With 220mA max current it can be left connected whenever the car is not
in use. Just hang a label over the steering wheel to remind the driver
its there and must be disconnected not dragged down the road. :-)

Some cars have a charging connector in the boot which has an ignition
interlock to prevent the car from being driven away while the charger
is plugged into the car.

Some but by no means all can be charged from the cigarette lighter
socket. Many modern cars disable it when asleep though. Older ones OK.

I charge my car battery old school with croc clips on the terminals.
Nice big fat spark jumps when I make contact. Initial current to a flat
battery about 8A falling to a steady 6A as the terminal voltage rises.

--
Regards,
Martin Brown