Energy...

Do you carry a lot of portable devices with you? Well now you can charge them on the go with the new solar backpack from gadget4all.com.

While solar backpacks aren't new, this latest model is priced at just $48 -- less than half the price of the Eclipse Solar Gear Laptop Backpack and one-fifth the price of the popular Voltaic Solar Backpack.

While the Eclipse and Voltaic models offer a few more bells and whistles, Gadget4all's device is no slouch, and comes at a better introductory price point. It comes with a 5.5V solar panel and has an output of 5.8V, allowing it to charge any small portable device such as a cell phone, MP3 player or GPS unit. On cloudy days, it can also be hooked up to a computer's USB port for additional charging capacity.

Worth a look for the road warrior or the student looking forward to the start of school in just six weeks.