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The Boston Globe

Business

A123 Systems files for bankruptcy protection

Waltham lithium ion battery maker A123 Systems Inc. filed for bankruptcy protection in a Delaware federal court Tuesday, a stunning fall for the alternative energy company that immediately became an issue in the presidential campaign.

A123 said it was calling off a major deal with a Chinese auto parts conglomerate that was expected to save the firm, and also announced it would sell its auto-related assets to another US battery maker.

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