I HAVE A 2002 JEEP GRAND CHEROKEE LIMITED. I HAD A NEW MOPAR POWER PRO6 BATTERY (PART # BA065750EX) INSTALLED BY A CHRYSLER DEALER EARLIER THIS YEAR. ON 12-19-06 I WAS TAKING AN ACCESSORY WIRE OFF THE NEGATIVE POLE OF THE BATTERY. UPON COMPLETION OF THIS PROCESS I WAS PUTTING THE NUT BACK ONTO THE NEGATIVE TERMINAL AND WAS TIGHTNING THE NUT WITH A WRENCH. AS I PULLED UP ON THE WRENCH TO TURN THE NUT, AN EXPLOSION OCCURRED WITH THE BATTERY. I WAS SPRAYED WITH ACID IN THE LEFT EYE , FACE, EAR, FOREHEAD AND NECK. THE NEXT DAY A INSPECTION OF THE BATTERY REVEALED THAT A BULGE EXISTED AT THE SEAM WHERE THE SIDE NEAR THE NEGATIVE TERMINAL HAD DISENGAGED FROM THE TOP SEAM. IT APPEARS THT DUE TO SLIGHT PRESSURE FROM THE WRENCH PULLING UPWARD TO TIGHTEN THE BOLT CAUSED A BREAK IN THE SIDE/TOP SEAM CAUSING AN EXPLOSION. *NM