Reddit Reddit reviews Shake Flashlight Magnetic Induction Bright LED Rechargeable Flash Light

We found 10 Reddit comments about Shake Flashlight Magnetic Induction Bright LED Rechargeable Flash Light. Here are the top ones, ranked by their Reddit score.

Tools & Home Improvement
Safety & Security
Flashlights
Handheld Flashlights
Shake Flashlight Magnetic Induction Bright LED Rechargeable Flash Light
Super bright blue/white LED bulbSimply shake to recharge flashlightPowered by principles of Faraday's Principle of InductionNever needs batteries, never needs bulbs, maintenance freeSave money - never have to buy batteries
Check price on Amazon

10 Reddit comments about Shake Flashlight Magnetic Induction Bright LED Rechargeable Flash Light:

u/wankware_police · 12 pointsr/Design

Class C Wankware offense You are guilty of the following crimes:

  • Posting images and information about a product for which there is no launch date or technical information.

  • Posting images and information about a product that suffers from SIS (Sharper Image Syndrome) or the need to build a gadget into another gadget where the combination is not inherently more useful than its parts.

  • Posting CGI images of a product with no real-world prototype.

  • Posting information about a product that uses old technology in a predictable way and calls itself "innovative."

    Explanation: Shake charging flashlights have been around for ages. Making a shakable radio isn't really that new/"innovative".

  • Posting information about a product that claims to a solution to a problem without actually solving it.

    Explanation: The designer claims that this pen will "attract more students toward their studies" because it will entertain them while they work. In reality, this pen will be more difficult to wield than a typical pen and will be much more detrimental if lost or broken. Also, and this is a moot point, who listens to the radio anymore?

  • Posting information about a product that uses some sort of generator where a battery makes much more sense.

    Explanation: Just because something moves doesn't mean you should try to draw energy from it. Because this device draws energy from your hand, it will be more difficult to write with and cause fatigue earlier. A simple AAA battery will provide hours and hours of use, decrease the cost of the pen, and not seriously alter the writing experience. At that point though, it would make more sense just to use a more conventional radio that plugs into the wall.

  • Posting information about a device that bends the laws of physics or makes slightly misleading claims.

    Explanation: Though I don't know exactly how the generator on this pen is supposed to operate, I'm guessing that unless it makes it seriously difficult to write (drawing a lot of energy from your hand), it will not be able to generate that much energy from writing. As such, it will either require a lot of pre-shaking to operate or it will remain very very quiet. Again, a battery makes more sense.

    You will be contacted to schedule a court date.
u/Jordahan · 7 pointsr/gaming

Actually, I think it's supposed to be one of these

u/MultiUseAccount · 5 pointsr/fffffffuuuuuuuuuuuu

Like the flashlight that is powered by ? Horrible reviews though

u/g0uveia · 2 pointsr/thelastofus

This was the only "shake to charge" flashlight i found. Doesn't have good reviews though

u/Kurnon_Devoured · 2 pointsr/thelastofus
u/ltx · 1 pointr/gaming

http://www.amazon.com/Shake-Flashlight-Batteries-Simply-Recharge/dp/B000637LTY

Time obviously shortened in the game to not bore you, but that's what you're doing.

u/Roger_Fcog · 1 pointr/gaming
u/cornjuliox · 1 pointr/gaming

Truth in Television, I suppose.

There are apparently flashlights IRL that work this way. You shake them to build up charge and get like 10 or so minutes of light. Sounds perfect for emergencies and disasters, since it requires no batteries to operate.

u/BoatLifeMN · 1 pointr/AskScienceDiscussion

It is totally possible (watches with gravity-powered generators are widely available). I think the question would be whether it produced enough energy to justify the cost and added weight.


If you've ever used a flashlight powered by "shaking" you'd know what I mean (they have an extremely low light output vs. the amount of shaking needed).

I'm not sure about the wattage considerations but I assume it would be complicated to transfer such a wide range of power to the battery.

u/mariushm · 1 pointr/videos

It has very low efficiency and torque, you wouldn't be able to charge much with that miniature thing.

You're better off with a more efficient device, such as.. let's say a bike dynamo and a bike wheel.... and you spin the wheel manually for a about 3-5 minutes to charge a phone enough to make a call.

Or you could build yourself a supersized charger based on the magnetic induction, the kind of system used in these flashlights with no batteries: http://www.amazon.com/Shake-Flashlight-Batteries-Simply-Recharge/dp/B000637LTY

You just need some insulated copper wire, some permanent magnets, a voltage regulator and a few super capacitors or a car battery to store the charge. Then use it like you would use a bike pump for example, to generate power.