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During last summer’s IEEE Energy Storage and Stationery Battery Committee meeting, there was considerable interest in a presentation by Telcordia’s Service Line Director, Richard Kluge. A large part of his discussion centered around several major incidents in the telecommunications industry. Due to time constraints, Mr. Kluge covered only high-level details about any of the events. The lessons to be learned from those and similar incidents bear sharing because many older plants are still in service. The purpose of this paper is to cover several such incidents in greater technical detail and show ‘take-away’ learning concepts to prevent such failures going forward. Incidents covered include: a large battery fire, vibrating bus bars in a dc plant, countercell modification error, and EPO error.