Quote:

I wonder if it can be repaired/rebuilt? That might help salvage money spent.



This would be better money spent if there is any chance of saving your battery:

http://www.optimate3.com/classic/


As simple as 1-2-3 : Just connect the OptiMate to your battery and the 6 stage program does the rest automatically and safely
Diagnoses & desulfates batteries safely
Suitable for all types of 12V lead-acid batteries
Maintains your battery automatically for months
Checks for & indicates unusual self-discharge trends
Recommended by major power sports vehicle OEMs
Full electronic & passive protection
OptiMate's unique algorithm (graph) specifically designed for power sport starter batteries
International certification : UL & CSA (USA & Canada), PSE (Japan), TüV/GS & CE (Europe), SAA (Australia)
2-year warranty and personal after sales service


MikeR