These cabinets are designed to safely store and charge lithium-ion batteries while minimizing fire and chemical hazards. But with their benefits come significant risks — fire, explosion, and. . The Vertiv™ EnergyCore Li5 and Li7 battery systems deliver high-density, lithium-ion energy storage designed for modern data centers. Purpose-built for critical backup and AI compute loads, they provide 10–15 years of reliable performance in a smaller footprint than VRLA batteries.