Upon initially inserting the battery, it took many presses of the switch to get it to turn on. Eventually it did. It was finicky one more time, but only took ~5 presses to illuminate. I haven't used the light in ~1 month and just tried to power it on now, right as a Category 4 or 5 hurricane is looming, and the thing will not turn on. Been trying for hours. I've swapped batteries a few times, to no avail. Seems the button is no longer working at all. Complete waste of money.