Bentley GTC Power
 

Hi Guys i am new to the site
I have a Bentley GTC 2007 and having problems with the battery power.
if i leave the car for more then 90 seconds all power shuts down and i have to start with the key using the other battery but once started i can turn off and start on the push button.
Both Batteries are new and the car runs fine although all electrical equipment restarts every time
Has anyone experienced the problem ?