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Battery discharging

Every now and again my car battery discharges completely, sometimes after a long run of 150 miles.

When I jump start it, the battery will function perfectly for several days or weeks until it discharges again. There is no particular senario, anytime of year.

The dealership have had the car in and can find no problem. The car has been ok for the last three weeks, and I have made no long journeys

Asked on 9 March 2011 by brummie19

Answered by Honest John
Reads like an alternator problem to me.
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