View Single Post

  #5 (permalink)  
Old 17-08-2009, 11:16 AM
pressld2's Avatar
pressld2 pressld2 is offline
Moderator
 
Join Date: Apr 2007
Location: Belvedere, Kent
Posts: 10,018
Re: Eco-Friendly Gadgets

I bought myself a small wind-up torch a couple of months back. Wind-up is a bit of a misnomer in this case as it just has a small lever at the side which turns a fly wheel inside when you press it. Spend a few minutes pressing the lever and you get a couple of hours of LED light. Not the brightest torch I've ever seen but good enough to avoid tripping over things.

I take Pete's point though that if the energy cost of manufacturing the mechanism for generating and storing the charge is greater than that of the batteries it might consume during its expected life then it's not really eco-friendly. It's so hard to be sure about these things.

Dave P.
__________________
(a.k.a. "Horizontal Dave")

"A good man is hard to find, especially if he's hiding. In a field. With combat fatigues and a false beard." - Wilson Dixon
Reply With Quote