I've been surfing the net and I've noticed shake flashlights... These flashlights doesn't require any batteries and all you need to do is to shake the flashlight foe a short period of times to get a sufficiently long output. I'm wondering if anyone here bought any of these flashlights?
Hi,
Hmm... never see before in Singapore. But I seen those mechnical touch light in DIY shop, but never try before... but it really sound interesting...
Have a nice day.
Yang Weixing "The universe is composed mainly of hydrogen and ignorance."
i dont think u want to shake ur hand throughout the night to keep the flashlight alive. probably an army L torch from beach road will suffice. $2.50 for the medium size torch ($5 for the big one) and some cheap red cellophane paper will get u going.
Wow, then I guess that maybe only a few in singapore have that kind of flashlights. Am thinking of buying one... But those brands all have hugh gaps between prices...
As seen in those reviews, maybe a 1min shake will be more than enough to provide a few hours of light... But the price is so high...
Fascinating Nature - The Night Sky.
Interesting Fact - Planets exists.
Fascinating Nature + Interesting Fact = Astronomy
Hi, bought one for the car and one for the house. The one for the house has 3 LED which is fairly bright. Bought mine from the DIY store at Great World City (Basement 1).
There are a few OEM ones around which are quite cheap (<$10). I can't remember what is Faraday's Law, but when you shake it, a magnet moves inside a coil, generating a current which is stored in a capacitor.
The brightness is OK for astro work if you have a red filter.
"The universe is composed mainly of hydrogen and ignorance." 
