Did you really think you needed some kind of batteries for your flashlight? Shake the Bulbless Flashlight gently in 30 seconds, and you have already produced five minutes of light from the LED-light. If you shake it intensively, you can load it up to last for more than 100,000 hours. Did I mention that it has a very high durability, and can withstand almost any temperature?
"Stephen Wolfram is the creator of Mathematica and is widely regarded as the most important innovator in scientific and technical computing today." - Stephen Wolfram
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