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For many years, FIAMM has been manufacturing and distributing Valve Regulated Lead Acid Batteries (VRLA) for a large spectrum of applications. As of today hundreds of thousand of cells and modules have been deployed around the world particularly in telecom installations. The proposed paper summarizes this experience and analyzes three main critical areas: Design, operations and safety. Issues like choice of manufacturing materials, acceptance testing and installation procedures are analyzed and discussed. The paper reports also the results of some battery testing, with particular reference to ohmic measurements for acceptance and warranty claims.