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Summary: What gifts and gadgets are on the market that give you free, eco-friendly energy?

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Waka Waka solar powered lamp and charger

The Waka Waka solar powered lamp and charger both charges your devices and works as a lamp powered by the sun.

The manufacturers say that one a single charge -- through a days' worth of sunlight -- the lamp will function for up to 40 hours. You can alter the amount of brightness and play around with different settings, and when the gadget gets low on energy, 4 LED lights will tell you.

The solar cell, a Sunpower model, is said to perform at an efficiency rate of 22 percent.

The product is available in black or yellow.

Price: £59.99 ($100) Via: Firebox Juice bar chargers

If you're on the go, an external battery for charging your gadgets can become a lifesaver. On offer from Juice is the solar-charged Juicebar, which can be charged via USB or through sunlight as a cleaner alternative. The 2000mAh rechargeable Li-ion battery is compatible with a number of USB-based devices.

Price: $39.99 Via: Juicebar

Topic: Tech Industry

London-based medical anthropologist Charlie Osborne is a journalist, freelance photographer and former teacher.

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