This rechargeable nickel cadmium battery is specifically designed for Exit / Emergency Lights. 8 " of wire length, Proper Wire Connector, Correct Polarity. Product Features: Voltage: 4.8 Volt Capacity: 500 mAh Battery Chemistry: NiCad Part Number: 485-BH-RTO1P Exit Sign Emergency Light Battery Fire Exit Sign, Fire Exit Light, NiCD, Ni CD 4.8 v 600 mah 800 mah 500 mah 1000 mah .7AH .7 .6AH .6 .8AH .8 This battery works for the following models: NI-CD 4.8V 500MAH CORUN NI-CD AA500 AA 500