DOES NOT HAVE POWER TO START VEHICLES ANYMORE?. IS JUST TIRED AND USED UP?. ( WILL ALSO FIT THE JCN4000 JUMP N CARRY UNIT). REVIVE YOUR 660 TO BETTER THEN NEW SPECS. WHY BUY A NEW JUMP PAK WHEN YOU CAN JUST REBUILD YOURS TO BETTER THEN NEW STANDARDS THAT WILL OUT LAST A NEW 660 JUMP PAK WITH EASE.
