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 Electronics (Guangzhou) Ltd., organized under the laws of China C&D Instuments, 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 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 Shanghai C&D Battery Company, Ltd., joint venture organized under the laws of China C&D Technologies Reynosa, S. de R.L. de C.V. organized under the laws of Tamaulipas, Mexico