Thank you Natalie.
From this information, it would seem that it is not wise to play the Good Samaritan and offer to jump start someone with a flat battery – despite what your instincts may be.
Many years ago I used the leisure to get out of a flat battery situation. I paralleled the batteries using jump leads. This was in the days before computer controlled engines.
The ruse got me home with no apparent long term effects to either battery. However, from what has been discussed so far it would seem that this ‘solution’ may not be wise with today’s modern vehicles?
Cattwg :-D