Ploughing through the weekend papers, and getting bored with iPad column inches, the tech story that tickled my fancy was the mobile phone battery that is charged by whirling it around a finger.

Phone dying on you and need to check that one last message or just finish a call? Whip this battery out of your phone, slot it over a digit and start spinning.  They reckon 30 seconds of twirling will give you another 2 minutes battery life.

Last year it was kinetic batteries that charge as you run or dance at festivals and now 2010 has begun with a twist.