5 Energy Efficient Office Gadgets
Stephanie Marcus,
Mashable,
Aug 03, 2010
I think the concept of 'energy efficient gadget' is an oxymoron (because the mere existence of the gadget is not efficient) but I want to highlight one interesting thing here: water powered calculators. Here's more on this. Of course, it's not the water that powers the battery, it's the carbon and aluminum anode and cathode (here's how to build one). What's significant is not the batteries - they've been around forever - but rather electronics that will now run on the very low power outputs of water batteries. I also like the solar power gadget charger - but remember, if this were truly energy efficient, we'd simply use solar cells. But they take a lot of cost and energy to make - at more than $200 per 10 watts they are useful only as camping gear (consider - it would cost $2000 to power your 100 watt stereo, $30,000 to power your 2,500 watt hair dryer).
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