A combined flashlight, smoke detector and emergency alarm assembly. A housing contains a flashlight having a bulb, reflector and window at one housing surface for illuminating an area adjacent to the assembly. A smoke detector is enclosed by said housing and includes an alarm for indicating the presence of smoke. A relay automatically turns the flashlight on when the alarm is activated. Vents in the housing permit ingress of smoke to the detector. A battery assembly in the housing provides power for the flashlight, smoke detector and alarm. A manually operable, momentary, normally closed, switch is provide to permit the alarm to be disabled, with the alarm enabled if this switch is released. Another switch is provided to enable the alarm independent of the smoke detector system as an emergency alarm. A manual flashlight switch is further provided to permit the flashlight to be used in a normal manner in a non-alarm situation. The battery assembly includes plural battery cells providing a higher voltage to the smoke alarm and having a tap to provide a relatively lower voltage to the flashlight.