Say you go out, an unexpected storm blows up, you lose power, the engine compartment floods and batteries are shorted (no Radio), drifting towards a reef. Will you be wanting an LED based signal lantern or a burning magnesium
Magnesium Flare 12,566,370 lumens
Odeo LED Flare 1,256.63 lumens
Plus even an out of date flare will burn brightly, maybe, if it doesn't do something else
But an LED flare with dead batteries you can use only to brain the sharks when they come your way.
The way I see it, your money or your life, your choice.