These batteries are the industry leader in the Critical Power Industry. It carries a four year warranty (3 Full, 4th Year Prorated). We set out to bridge the gap between design life and service life. After all, what good does a spec do on the drawing board if real world results do not match up. This new "Elite" brand of GPS batteries was designed to surpass all battery brands and is well suited for stringent UPS and electronic applications requiring ultimate reliability and life.