Photos: Gadgets go green at Greener Gadgets

Finding a portable solar panel powerful enough to run your laptop computer is tricky. Most portable solar chargers, with or without batteries, generate enough electricity for smaller gadgets, like digital music players, GPS devices, or cell phones.

But there is a bag that can help charge your laptop while you walk around. Made by Voltaic Systems, the bag sports a 14-watt panel and an integrated lithium-ion battery with adapters for different devices, including laptops. The product, unveiled at the Consumer Electronics Show in January, will cost $599 and will be available in the spring.

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