Battery Battery Chemistry Nickel Cadmium Battery Capacity 2.5 Ah Compatible with Series PG Compatible with Product Type Emergency Lights Recharge Time 168 hr Voltage 8.4 V Standards UL 924 Rated Life 5 yr White Housing Color Compatible Mfr Model Number PGB PGP PGW PGZ Maximum Operating Temperature 113 Degrees F Minimum Operating Temperature 32 Degrees F 6 1/2 to 7 in Lead Length Overall Depth 1 1/4 in Overall Height 2 1/4 in Overall Width 7 1/4 in