180 V Li-ion battery pack to extend the runtime of the APC Smart-UPS SRT 5000 VA, 8000 VA or 10 kVA Incl. 2 U rack-mount kit Up to 10 battery packs can be installed per UPS system. Battery life up to 10 years Safe to operate in up to 40 °C environment temperature Net weight: approx. 32.4 kg Additional runtime: 5000 W load: + approx. 12 min 3500 W load: + approx. 18 min 2500 W load: + approx. 21 min