Power keeps draining!!!!!! on 1999 Cadillac DeVille

If I ask someone for a jump or use my jump starter the car works fine, but once I let the car sit it won't start and needs to be jumped again. That's only if my jump starter has enough juice. If I let it sit out for more than a day - nothing works. Not even the key less entry system works so I have to use the key to open the car. Help please!!!!!

by in Washington, DC on April 04, 2009
1 answer
ANSWER by , April 05, 2009
There can be a few reasons for this, and a thorough inspection and testing of the battery and charging system should help determine the cause.