What is it?
A wind-up mobile phone charger.
What does it do?
What it says on the tin. Turn the handle to give your mobile battery a quick boost, wherever you are. Like Freeplay's radio, the Freecharge turns wind-up power into electricity, but replaces the radio's heavy clockwork with a high-tech mini-alternator. Forty-five seconds' twiddling equates to five minutes' chat, and it's light enough to fit in your bag or pocket. So next time your phone pegs out mid-call - on the train or in the jungle - you can still have the last word.
What's the competition?
In these days of mass travel, you can buy adapters that match your regular charger's plug to just about any socket, and there are disposable phone batteries on the market. But these lack both the green credentials and the desert-island-survival appeal of the Freecharge.
Where can I get it?
It's coming to a high street near you next month, priced at about pounds 45.