A few months ago I posted about a Casio Solar Calculator, and one of the best features about it was the no-need for batteries.

The Shake-u-lator calculator also has that feature, and to get the calculator working the only thing you need to do is shake it, cool huh? There were already a few devices that used the shake-and-use concept, like wristwatchs and flashlights, but this is the first time I see it being applied to a calculator.

It displays 8 digits and uses Faraday's Principle of Electromagnetic Energy to operate, shake it a couple of times and get at least 10 minutes of energy to use the calculator.

Available at gadgets.co.uk for �9.99.

Via The Gadget Blog