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I seem to have an electrical issue and could use some advice from anyone who has seen something similar. About a year ago, I replaced the right battery, because it would no longer hold a charge (it was about 3 years old). Now I am having the same problem with my new battery (a Gill 243S also installed in the right position). I certainly expected the new battery to last more than a year, but while it does charge some during flight, it is dead again in about two weeks. I checked to make sure everything is turned off, to include the interior lights. Also, it doesn't seem to matter what position the battery switch is in, the battery is dead in about two weeks. The only other indication that something might be wrong is a differential in the alternator loads. Since I bought my Mooney 2.5 years ago, the left alternator always carries more load then the right (about twice as much). But I don't know the way the left and right alternators are wired to know if there might be a problem on the right side indicated by the lower right alternator load. I am going to buy a charger and get the battery back to a full charge and then see if I can detect a current draw from the battery when all power is off, but am interested to see if anyone recognizes this issue. Dave