Warner Power LLC, Warner, N.H., acquired Daykin Electric Corp., a 25-year-old manufacturer of transformers, transformer disconnects, and power supplies in Livonia, Mich. A nationwide network of distributors will continue to handle Daykin's sales and marketing, and manufacturing and associated activities will remain in Livonia. Deborah Justin, former sales and marketing manager, has been promoted to vice president and general manager and is now responsible for all Daykin operations.