How many times have you needed to use a flashlight, but it was missing batteries or the batteries were dead? This problem is compounded by the fact that you have to find new batteries in the dark! Needless to say, flashlights with alternate power sources have caught my eye. NightStar’s shakable flashlight is one great solution. With every shake, it passes a magnet through coils embedded in the flashlight to produce electricity. Thirty seconds of shaking produces up to 20 minutes of light for use in or out of your home. Applied Innovative Technologies sells the flashlight for approximately $30 on its site.