Exhibit 21 SUBSIDIARIES OF C&D TECHNOLOGIES, INC. 1. C&D Charter Holdings, Inc., incorporated under the laws of the State of Delaware 2. C&D International Investment Holdings, Inc., incorporated under the laws of the State of Delaware 3. C&D Holdings Limited, organized under the laws of the United Kingdom 4. NCL Holdings Limited, organized under the laws of the United Kingdom 5. C&D Technologies (NCL) Limited, organized under the laws of the United Kingdom 6. C&D Electronics (GZ) Limited, organized under the laws of China 7. C&D Components Hong Kong, Limited, organized under the laws of Hong Kong, China 8. Charter Power F.S. Ltd., incorporated in the Islands of Bermuda 9. C&D Technologies (Power Electronics) Limited, organized under the laws of Ireland 10. C&D Technologies de Mexico, S.A., de C.V., organized under the laws of Sonora,Mexico 11. C&D Technologies (UK) Limited, organized under the laws of the United Kingdom 12. C&D Technologies (HK) Limited, organized under the laws of Hong Kong, China 13. C&D Technologies (Italia), S.r.l., organized under the laws of Italy 14. Shanghai C&D Battery Company, Ltd., joint venture organized under the laws of China 15. C&D Technologies Reynosa, S. de R.L. de C.V. organized under the laws of Tamaulipas, Mexico 16. C&D Dynamo Corporation, incorporated under the laws of the State Delaware 17. C&D Power Systems (Canada) ULC, organized under the laws of Canada 18. C&D Technologies (CPS) LLC, organized under the laws of the State of Delaware 19. C&D Technologies (CPS) ULC, organized under the laws of Canada 20. C&D Technologies (Celab) Limited, organized under the laws of the United Kingdom 21. Celab Power Management Limited, organized under the laws of the United Kingdom 22. Datel Holding Corporation, organized under the laws of the State of Delaware 23. C&D Technologies (Datel), Inc., organized under the laws of the State of Delaware 24. C&D Technologies KK, organized under the laws of Japan 25. C&D Technologies (Datel) GmbH, organized under the laws of Germany 26. C&D Technologies (Datel) SARL, organized under the laws of France 27. Datel (UK) Ltd., organized under the laws of the UK 28. C&D Electronic Technology (Shanghai) Co. Ltd, organized under the laws of China 29. Dynamo Acquisition Corporation, organized under the laws of the State of Delaware 30. C&D Tech (Singapore) Pte. Ltd., organized under the laws of Singapore.