1988 Jeep Wagoneer • 6 cylinder 4WD Automatic • 15,070 miles

I have a 1988 Jeep Wagoneer. Replaced the battery about 2 months ago, was running fine though it took ~5 seconds for it to turnover (was running like that well before battery was replaced). A few days ago I left the lights on and the battery died. I got it jumped and made it home (~15min away) just fine. The next morning it was dead again. That afternoon I jumped it again and let it run for ~5-10min. Then I tried to start it on its own and it did just fine. Now the next morning its dead again. I was thinking the battery wasn't bad, but now I'm thinking maybe the alternator? Any help would be appreciated. Thanks!
February 28, 2011.

Get both alternator and battery load tested if okay-have the electrical system checked out for excessive parastic draw-

Feb 28, 2011.