Replacement Battery Cartridges (RBCs) are user replaceable and hot swappable. Each RBC is a complete set of tested and charged batteries for your APC UPS. This battery pack works with a variety of APC UPSs. Please ensure compatibility with your UPS before purchasing. Operating Temperature = 32 - 104 Degrees Fahrenheit (0 - 40 Degrees Celsius ), Storage Temperature = -15 - 45 Degrees Celsius. Operating Elevation 0 - 3048meters and Storage Elevation 0 - 15240meters.