Why is a batteryless flashlight ideal for night sky-watching?
Your NightStar batteryless flashlight is not blindingly bright and glaring and therefore will not affect your night vision compared to using a Maglite flashlight. It is one of the best flashlights for extended night-time use. Reduce eye strain. 12. Why different models of batteryless flashlights require different amount of shaking to produce sufficient amount of light? Several factors will determine how long a batteryless flashlight needs to be shaken and re-shaken to produce sufficient light:- • the storage power of the capacitor measured in farads determines how much energy it can hold; • the strength of the magnet and the size of the coil will affect the amount of energy being generated and transferred to the capacitor, and • the length of the batteryless flashlight which will determine the speed of the sliding magnet. The faster it is, the more energy it will generate.
