On 30/05/2020 09:22, Smolley wrote:
Further to a post a few weeks ago, about the battery being flat in my car
after standing idle for a few weeks. I subsequently charged the battery in
the house using a laptop power supply and a couple of headlight bulbs in
series to deliver a charging current of ~2 amps over several days. I
eventually put the battery back in the car and fitted a knife switch
isolator. Yesterday I went out in the car and returned after about 10
miles. This morning after the engine fan had stopped I measured the
standing current across the open knife switch and was surprised to see the
meter was reading 3.26 amps. No wonder the battery flat!

The standing current once it has finished all its power on self tests
and become quiescent is likely to be in the range of about 30-100 mA. It
varies a bit with the car, model and how many LEDs it decides to flash.

--
Regards,
Martin Brown