The world’s largest maker of car batteries, Exide Technologies, may be filing for bankruptcy protection next week, causing concern in northeast Iowa. The Chapter 11 filing is expected to be in U-S Bankruptcy court in Delaware, to allow the New Jersey-based company to delay payments on its two-point-five billion dollars in liabilities and continue to operate. Exide has a plant in Manchester, Iowa, employing about 440 people. Mass layoffs are not expected and there is no indication the plant will close.