Hi. My B310, A12 has a problem with the battery going flat. My neighbour had a battery problem with her stanza and said changing the alternator fixed it. I checked the alternator today. It was putting out 14V max. when it first started, but a few minutes later it only put out 13.something at idle and did not change if I reved the engine. The alternator has had the bearings and brushes replaced. Could it be that the rectifierin it is not working properly. Has anyone else had this problem or know how to solove it?