Freeplay will soon launch a wind-up mobile phone charger.

The bright yellow Freecharge looks like a sporty Walkman or maybe even a latter-day football rattle. But what it does is allow you to power your mobile by using a sustainable form of energy. To power your mobile phone with the Freecharge you simply wind it up and, in a mere minute of elbow grease, you will be given an average of five minutes talk-time and up to four hours’ standby, depending on the state of the phone’s battery.

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