01 Skoda Octavia darining battery

Hi Im wondering if anyone can help me please, my 01 1.4 petrol Skoda Octavia battery keeps dying. I replaced the battery and it still kepy dying, replaced the alternator and still no luck. The car will run for about ten minutes and die then. There is no warning lights on the dash or anything obvious. I have disconnected the radio to see if that was draining the battery and it was not the fault, I also disconnected both electric windows as the passenger window is inop but still havnt found the problem. Can someone help me out please :-)