EXHIBIT 21 SUBSIDIARIES OF C&D TECHNOLOGIES, INC. C&D Charter Holdings, Inc., incorporated under the laws of the State of Delaware C&D International Investment Holdings, Inc., incorporated under the laws of the State of Delaware C&D Holdings, Ltd., organized under the laws of the United Kingdom NCL Holdings, Ltd., organized under the laws of the United Kingdom C&D Technologies (NCL), Ltd., organized under the laws of the United Kingdom C&D Technologies (NCL), Inc., incorporated under the laws of the State of North Carolina Newport Electronics Guangzhou, Ltd., organized under the laws of China C&D Instruments, Ltd., organized under the laws of the United Kingdom C&D Components Hong Kong, Ltd., organized under the laws of Hong Kong, China C&D Technology, Ltd., organized under the laws of the United Kingdom C&D Microtek, Ltd., organized under the laws of the United Kingdom Charter Power F.S. Ltd., incorporated in the Islands of Bermuda C&D Technologies (Power Electronics), Ltd., organized under the laws of Ireland 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