APC Symmetra RM 2-6kVA Battery Module Product or component type Battery accessory Number of rack unit 2U Number of cables 1.0 Battery type Lead-acid battery Battery location Internal battery Number of battery free slots 0 Number of battery filled slots 0 Device mounting Enclosed battery cartridge Number of battery replacement quantity 1 Ambient air temperature for operation 0…40 °C Operating altitude 0...10000 ft Relative humidity 0…95 % Ambient air temperature for storage -15…45 °C Storage altitude 0.0000000000…15240.0000000000 m Storage Relative Humidity 0…95 %