EXHIBIT 21 SUBSIDIARIES OF C&D TECHNOLOGIES, INC. C&D Charter Holdings, Inc., incorporated under the laws of the State of Delaware Charter Power F.S. Ltd., incorporated in the Islands of Bermuda Power Convertibles Corporation Ireland Ltd., organized under the laws of Ireland PCC Mexican Holdings, Inc., incorporated under the laws of the State of Delaware PCC de Mexico, S.A. de C.V., organized under the laws of Sonora, Mexico C&D Technologies de Mexico, S.A., de C.V., organized under the laws of Sonora, Mexico C&D Acquisition Corp., incorporated under the laws of the State of Delaware C&D Technologies (U.K.) Ltd., organized under the laws of the United Kingdom C&D Technologies (HK) Ltd., organized under the laws of Hong Kong, China C&D Technologies (Italia), S.r.l., organized under the laws of Italy C&D Batteries Ltee, organized under the laws of Quebec, Canada Shanghai C&D Battery Company, Ltd., joint venture organized under the laws of China