Thanks very much Brian R. for your prompt reply but why? An auto sparky showed me once how to test if my alternator was working correctly. Firstly he checked the battery voltage with the vehicle turned off and read 25volts then he started the vehicle and read 27.8 volts. which he said was the correct charge voltage. I asked the question only because the vehicle is now idleing faster which makes starting real easy but what problems can I expect to arise from this if any? thank you.