4.8W would actually make more sense, I thought the figure I got was a little low. So, with a battery capacity of 76.8W, how could it possibly do 17-18 hrs with the dual 650 cameras ??? 10 hrs would seem more like it
Decided to fully charge the battery last night. I ran it today on G Sensor (Parking Mode) and the good news is it was still working after work (7.5hrs). I think my issue is short journeys to work not giving the unit enough time to fully charge. I will see how it goes but guess I may have to take it out and charge it at home a few times each week.
Just got to find a suitable charger in UK now with female cigarette lighter socket end on iy.
Even if I purchased the extension battery, I'm still not giving it enough time to charge in the car and whilst it would be ok for first few days I would be back to my original problem