I didn't really make this clear when I posted, so I'll add...
I think that the best solution is minimal use of electronic devices. Cell phone and camera are my two main electronic devices. I could also take either a kindle or an iPod, but the cell phone can fill both of those needs. The iPod would be for audio books rather than for music. As I said the phone (Blackberry) fills that need nicely.

The cell phone typically gets used to place one short call home per day or less and is turned off when not in use. If I read audiobooks, I turn the connections off and battery use is minimal. That means it goes at least a week without the need to recharge. I usually use the internet mostly only when there is wifi and then there is usually a place to plug in.

If I were to take it along, my kindle, it goes even longer on a charge. If I use my iPod shuffle to read books it goes pretty far on a charge too. As I said though, I leave these home if I have my Blackberry along.

My camera is fine for quite a while on one battery, but batteries are something like .25-.5 ounces and if bought from an after market source rather than the camera manufacturer are pretty cheap, so if I take a few batteries I can go at least a month. I can also just take one (or two) and take a 2 ounce after market charger. Since it goes for one or more weeks per battery, plugging in once in a while is no big deal.

My Petzl Tikka headlamp takes 3 AAA batteries and I can go for several months on one set. My tail light takes 2 AAA batteries and goes for a few weeks to a couple months depending on the tour.

Laptops, GPS's and other devices I can easily do without.