I was asked where thease came from .Thet were used at tower sites for a back up power supply for a security system.They were all checked to be working..They put in a different system and thease were not needed anymore. Carl -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.300 / Virus Database: 265.8.7 - Release Date: 2/10/2005