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July 13, 2007

Freedom Hybrid Flashlight: Shake flashlight operates with or without batteries

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The Freedom Hybrid Flashlight combines the best of both worlds since the light can be operated as a "normal" flashlight with batteries and in the event the cells expire you can produce the illumination required with a few tugs on the device. 'One click gives you Lithium powered light (battery included). Two clicks give you ENDLESS self-generated light. Shake it and a magnet passes through a copper coil generating electricity. One minute of shaking produces hours of bright light. Both options give you light from an ultra bright LED.Price: $24.95

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June 18, 2007

Batteryless [Shake] Flashlight Operation Explained

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DR. KNOWLEDGE writing over at The Boston Globe has posted an explanation on just how the Shake Flashlight produces illumination. ‘The main idea behind batteryless flashlights is to use the physical motion of the flashlight itself to provide the energy to light up the bulb -- that is, you have to shake it. What happens is always a variant on the following basic idea: If you have a coil of wire and drop a magnet through it, this will make some electricity flow through the coil and whatever it's attached to. This electricity can be stored to power a light bulb.’

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July 17, 2006

The Astronomer's Flashlight: The Great Red Spot Shake Flashlight

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Dave Bonandrini over at Astromart.com reviews the Great Red Spot Shake Flashlight which is specifically targeted at folks interested in "astro related duties". 'When the Faraday Principle, shake-to-charge flashlights came out, I bought a few immediately. For those who are not familiar with these flashlights, they work like this: Shaking the flashlight causes a magnet to pass through a coil. This produces electricity that charges a large capacitor (a kind of storage cell). The bulb is a LED (Light Emitting Diode) that lasts forever without burning out. I placed a piece of red brake light repair tape over and around one of the lights. Now I would never have to buy batteries, those expensive Krypton bulbs, or worry about leaving my flashlight on again. Or so I thought.

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July 9, 2006

ABC News: Faraday Flashlight Passes "Brutal" Test

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They say the "proof of the pudding is in the eating", but in the case of the he Faraday flashlight maybe the test would have to be one of the "beating", if the verdict reported on ABC local news is anything to go by. 'You've probably seen the ads and have wondered, just as I did, whether this flashlight is really all it's cracked up to be.We're always reminding bay area consumers to be prepared for emergencies. That includes having certain items on-hand in an evacuation or earthquake kit -- including a working flashlight. The "Faraday" flashlight is based on a simple concept: shaking causes a magnet to be passed rapidly through a copper coil, producing an electro-magnetic current that powers the light. It's not a new theory, but the info-mercial makes some pretty amazing claims.'

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April 17, 2006

Forever Flashlights.com: Large Forever Flashlight On Sale

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Are you considering to purchase a "shake flashlight"? There is a sale now on over at ForeverFlashlights.com. The Large Forever Flashlights which were previously sold at $29.95 each, are now going for $25.45 but sales are limited to residents of the USA. This flashlight never needs bulbs or batteries, all you have to do is supply the energy in part by shaking and you should be good to go for about five minutes or so. 'The Forever Flashlight uses the Faraday Principle of Electromagnetic Energy to eliminate the need for replacement bulbs and batteries. The Faraday Principle states that if an electric conductor, like copper wire, is moved through a magnetic field, electric current will be generated and flow into the conductor.'

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March 11, 2006

NightStar Magnetic Shake Flashlight

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How do you view the concept of a "shake flashlight"? Whenever I come across the term I immediately conjure up scenarios of myself forever jerking my elbow and arm joints to get the thing to work. WebBikeWorld reviews the NightStar magnetic shake flashlight and concludes that aside from the concern of the "strong magnetic field" that surrounds the light, it is actually a good buy. 'The NightStar is charged from empty by shaking it back and forth for about 3 minutes at 2-3 times per second. The light must be held parallel to the ground and the magnet must pass completely back and forth through the coil. It sort of has a spring effect, I think due to the sealed chamber, which doesn't let any air escape. The air acts as a cushion at either end of the shake.

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