Make tools, fittings, and small metal pieces used in other products.
Tests and treats rejected storage batteries and mixes acid solutions: Determines specific gravity of electrolyte in rejected batteries and adjusts solution to specified concentration and height in cells [ACID FILLER]. Tests batteries for specific defects [BATTERY TESTER; FINAL INSPECTOR]. Fills batteries with fresh electrolyte, charges battery and tests battery for performance, using voltmeters and ammeters. Segregates batteries that fail performance test. Turns valves to fill vats with specified quantity of acid and water for use in forming and charging processes. Activates agitator to diffuse liquids, and tests solutions for specified concentration, using hydrometer.