• Applicable power supply: eNSP-300P • 5 inch bay built-in type, compatible with a Lead Acid Battery Replaceable to Ni-MH battery at maintenance. • Compared with Lead-acid Battery, Ni-MH Battery has 1.5 times longer discharge time and 3 times longer life. • Built-in heater for preventing decrease of capacity at low temperature. Battery package status output (charging or backup operation) is available. • Preventive circuit for internal leakage current installed. • RoHS compliant