These look quite similar to what I have. Mine's function is a bit different. It has a selective pushbutton switch as well, the first depression and the three main white leds illuminate. The second depression and the three main white leds and two amber side mounted leds strobe continuously. The third depression and the lights are extinguished. If I crank mine for two minutes, I get at least a good half an hour of bright light from the three main leds. Mine have been going strong for quite a while now, rather impressive for a chinese mfr.

Regardless the configuration, this is a very good light to have for emergencies and as backup. I use mine more than any other flashlights, including the little photon in my pocket.