Speaking of electronics invading our lives, I would think physical robbing of backs would be, so passe. <img src="images/graemlins/wink.gif" alt="" />

I would really like to try solar, as it seems to be a great system. It will produce electricy whenever you have "adequate" sunlight. You can make the system standalone to charge batteries, or use it as a direct power source. From what I understand, you usually don't us it as a direct power source, as cloud cover will change the amount of power produced. Most radios operate off of 12V single battery, or AA's. If they normally come with a wall adapter, you can make your own "pigtail" (Using RACES style connector is probably best) to go between the device and the battery pack. You may need to find a way to convert voltage and amperage. I'm not sure how you do that. There is probably a neat little device for that.

Definately best to consolidate your batteries into a single type. Watch style batteries are probably so small, that you can take spares with you. It's the bigger styles I'd be more worried about.