This past October I had to return my H51w to Zebralight for warranty repair. The light was draining the battery within a couple days even though the light was being used only on its lowest setting for just a few minutes a night. A week ago, my SC50w started doing the same thing. Since I've owned it for two years, it is no longer under warranty, though. I'm currently waiting for Customer Service to get back to me. I hope I can get it repaired (even if I have to pay for it.) This is all very frustrating and troubling.