Cheapo LED Flashlights --- Battery Hogs?

What I have actually found both with cheap and expensive flashlights is that their battery usage is directly relational to how often I turn them on and how long I leave them on. There is another factor not being discussed here, that is how many leds each of them has. Some of the more expensive ones actually only have one but yet they put out more light. Most of the cheaper ones have several and yet they may not put out as much effective light.