Portable Beacon Battery powered with magnetic base beacon. Such a handy, robust 360 degree triple flash light. Even has a lanyard to hang it if that suits. Our LED Portable Beacon Battery is powered by 2 D sized batteries. Of course, the LED lights draw minimal power, so this prolongs battery life. Also, with the magnetic base they can be used on vehicles and machinery. Whether you place them on a vehicle or use them to guide the Flying Doctor in at night, these beacons are very handy. Indeed, they can be a life saver. For remote airstrips, we have a good price deal on a ten buy. Every remote Station and airstrip should have these beacons handy. Can be set to start up automatically at night.