Because high temperatures exist in LED and fluorescent luminaires, Bodine emergency drivers/ballasts use a variety of specially constructed, high-temperature batteries. These batteries require no maintenance and have long life expectancies. Bodine emergency drivers use various battery technologies like nickel-cadmium, nickel-metal hydride, sealed lead acid and lithium ion. The choice depends on certain requirements of the driver/ballast, including ambient temperature, output power and physical size, among others.