Good points. thanks. I have been out for a short drive and the car has been resting for two hours. I went out and did a #9 obc test - turning the ignition switch to pos 2. The lights turn on due to dark cloudy rainy day and the air con on. The reading is 11.6V. I am assuming this means the batter is towards the end of its charge life unless there is another issue. I will open the cargo bay floor and have a look to see for a date code tommorrow.