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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.
Birksun Atlas Blue
The Birksun Atlas Blue backpack is a tough, 20-liter container with an inbuilt solar power for charging your gadgets on the go. The six-watt solar panel powers a 2,400mAh battery, and one hour of sunlight is able to generate roughly a 25 percent charge for smartphones, connected via a range of USB connectors.
Logitech Wireless Solar Keyboard K760
Logitech's K760 keyboard, suitable for the Mac, iPad or iPhone, is a wireless accessory that is charged by any type of light, including the sun, lamps, indoors or out. Once fully charged, it is able to work for three months.
Price: £69.99 ($116)