It's very possible that the plates in the battary were not straight. If the battery was dropped at all, or really shaken up, then the plates can become dislodged and cause problems. Sounds like this could have been the case.
Good Luck!
- Zack
WANTED: T-Red HEATED Side Mirrors
FOR SALE: 4 14" Alum Alloys and Nearly New Avid H4s Tires w/ Center Caps
2000 T-Red SVT
1995 LX V6 MTX (RIP)