Im having another old age moment and need your assistance.I have a leisure battery on my 2009 van I thought when I was not connected to the mains the leisure battery would power the lights etc.? However,it doesnt appear to if im reading the manual correctly this only happens when the van is attached to the car yet on my old van the leisure battery worked the interior electrics am I reading the manual correctly? Also there is a meter on the van for reading the state of the leisure battery I had what I was told was a dud battery it showed u 13.7 I then fitted a brand new battery and its also showing u 13.7 what does this mean?