EXHIBIT 32.1

                                  CERTIFICATION


Pursuant to 18 U.S.C. Section 1350 as Adopted Pursuant to Section 906
of the Sarbanes-Oxley Act of 2002

Pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the
Sarbanes-Oxley Act of 2002, each of the undersigned officers of Greatbatch, Inc.
(the "Company"), does hereby certify, to such officer's knowledge, that:

The Annual Report on Form 10-K for the year ended December 29, 2006 (the "Form
10-K") of the Company fully complies with the requirements of section 13(a) or
15(d) of the Securities Exchange Act of 1934 and the information contained in
the Form 10-K fairly presents, in all material respects, the financial condition
and results of operations of the Company.



 Dated: February 27, 2007
                                         /s/ Thomas J. Hook
                                         -------------------------------------
                                         Thomas J. Hook
                                         President and Chief Executive Officer
                                         (Principal Executive Officer)



Dated: February 27, 2007
                                         /s/ Thomas J. Mazza
                                         -------------------------------------
                                         Thomas J. Mazza
                                         Senior Vice President and
                                         Chief Financial Officer


This certification is being furnished solely to accompany this Form 10-K
pursuant to 18 U.S.C. Section 1350, and is not being filed for purposes of
Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise, and
is not to be incorporated by reference into any filing of the Company unless
such incorporation is expressly referenced within.