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The number one reason most exit signs or emergency lights fail their readiness tests is a dead battery. Unfortunately, most backup batteries work between 5-10 years. Even rechargeable power cells lose the ability to reach a full charge over time. To ensure your crucial backup lights are in compliance with the universal "90 Minute Minimum" backup time, you need to swap out the old cell with one of our replacement batteries. We offer a large assortment of replacement nickel cadmium (Ni-Cd) batteries and sealed lead acid (SLA) batteries. Call us today at 800-282-5600 with any emergency light battery questions you might have.