A friend has had a Renault Clio Expression 1.2 16 valve 3-door since its first registration on 15th November 2001. It has done 18,000 miles. Since the warranty expired, the battery has been going flat after a week. The car is on its fourth battery that also goes flat after a few days and no one has been able to find out why. Nothing obvious has been left on, no courtesy lights. A fault light used to show but that has remained off after the local garage applied their test equipment. The Renault agent was only able to suggest that the computer might be at fault. The current battery is now charged as required in situ. Small red illuminations behind the radio controls are permanently on, the radio is never used. Can you please suggest what might be running the battery down?