LITHIUM-ION BATTERIES: Lithium-ion batteries last twice as long as traditional VRLA batteries, or longer. LOW TOTAL COST OF OWNERSHIP: Fewer or no battery replacement over the life of the Vertiv PSI5 Lithium-Ion UPS. 5-YEAR ADVANCED REPLACEMENT : Vertiv backs this UPS system with a 5-year advanced replacement including battery. LONGER RUNTIME: This 1500VA UPS offers up to 7. 5 minutes of runtime at full-load and 17. 7 minutes at half-load. FASTER RECHARGES: Get 100% capacity by recharging in 2 hours or less in this rack/tower UPS.