Compatible external battery cabinet gxt4 240vbatte type valve regulated non spillable lead acid quantity x voltage x rating 1 x 20 x 12 v x 9 ahr environmental operating storage temperature 0deg c to 40degc 32degf to 104degf 15deg c to 50degc 5degf to 122degf relative humidity 0 rh to 95 rh non condensing maximum operating altitude up to 1000 m 3281 ft at 25degc 77degf without derating