I'm not as concerned with another pound or two of weight, as I am with increased drag. Including cranking drag going uphill or into a headwind. We all enjoy having surplus kinetic energy to burn on those long downhills...

Yes, weight matters, too. But here's a news item that reflects my thinking. If the US Marines are now using solar in combat zones in Afghanistan, why not some old guy who is out on the docks with his bike and laptop computer? Or, using up his GPS batteries while exploring a couple of small coastal villages in a foreign land?

Solar Power Means Less Batteries and More Bullets for U.S. Marines
Published May 08, 2011
| The Wall Street Journal


Read more: http://www.foxnews.com/us/2011/05/08...#ixzz1LqpnYIKs