Odd one, every now and then the car wont start, its like the battery is dead, just clicking and interior lights flashing when key is turned, and will always start straight away with jump leads or rolling bump?
I thought it was due to the cold or prolonged non use (sometimes go days without using it) but last week or so its done it whilst out and about, i stopped to check tyre pressures today and it wouldnt start when i got back in? So it had been running no problems, was warm etc?!
If it was alternator then wouldnt it be constantly struggling to start? rather than odd times? (usually the most inopportune moments isn't it too?)
Just to add it isnt even trying to 'turn over', just clicking