I BOUGHT A USED ORDER PICKER. THE BATTERY WAS DEAD. I TOOK THE BATTERY TO A SHOP AND THEY RAN IT TROUGH SOME BASIC TESTS AND GOT IT TO CHARGE BUT ONE CELL IS WEAK. I HOOKED IT UP TO UNIT AND THE GAUGE SHOWS IT RIGHT ON THE RED AND YELLOW LINE. THE HORN WORKS, THE SLACK LINE LIGHT IS ON BUT NOTHING ELSE WORKS. should I FIX THIS THING OR SCRAP IT. tHEY WANT 325.O0 TO DO THE NEXT MORE COMPLICATED TEST TO SEE IF BATTERY IS GOOD. I DO NOT KNOW IF ANY OF IT IS GOOD WITHOUT A GOOD BATTERY. I DO NOT WANT TO SPEND THOUSANDS OF DOLLARS TO FIND OUT ITS NOT JUST A BATTERY. NEED HELP TO DECIDE WHAT TO DO.