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One Power, LLC specializes in engineering, furnishing and installation as well as preventative maintenance services for DC power equipment. Based in Shawnee Mission, Kan., the firm renders an array of services, including new power plants, battery string additions/replacement, power distribution addition/replacements, power transition, central office grounding survey/updates, recording and alarming verifications. It offers DC power plant preventative maintenance services for numerous telecommunications firms. One Power, LLC partners with several companies, such as Emerson/Marconi, PECO II, Benning, East Penn and NorthStar. Its list of clients comprises Sprint, Embarq, Kansas City Power & Light and AT&T.