Exhibit 10.3 FIRST SUPPLEMENTAL INDENTURE THIS FIRST SUPPLEMENTAL INDENTURE (this "Supplemental Indenture") is entered into as of April 2, 2007, by and between Greatbatch, Inc., a Delaware corporation (the "Company"), and Manufacturers and Traders...Supplemental Indenture • April 4th, 2007 • Greatbatch, Inc. • Miscellaneous electrical machinery, equipment & supplies • New York
