So... I'll keep it simple.
If the car is left to stand for 2-3 days it won't start, although all electronics still work ie stereo, lights, windows. Polar shows 11.5v ish
Jump start the car and shows 14.1v
If I do some vcds work or general tinkering for say 30mins the battery will be at the same state as sitting for the 2-3 days
Investigations I have done:
Tested battery draw in series,
First minute: 0.90a
Next 25mins: 0.14a
Then on: 0.02a
I have take for a basic battery check at halfords and local garage and both say something running, but surly this is the car shutting down for the first 30mins?
Battery is Bosch S5 and 4 years old. And just test now with multimeter after shut down and is at 12.3V
Any help would be greatly appreciated