This portable electric recharging device could be a lifesaver if you break you leg on a windswept mountaintop in the middle of the night and find that your mobile phone battery is dead when you try to call for help.

Of course that’s vanishingly unlikely (and not part of the official sales pitch) but the K3 is an interesting example of “tribrid” technology - using three sources of power. You can plug it into the mains electricity, it has tiny solar panels and a micro wind turbine … Going on sale in June for $99.95, it can charge cell phones, iPods or other electronic devices.

“The K3 allows anyone to charge their devices at any time, anywhere in the world,” said Tod Wagenhals, president of makers Kinesis Industries in Arizona.

Hybrid technologies – for instance cars using both gasoline and another power such as an electric motor – have taken off in recent years as part of efforts to cut greenhouse gas emissions.

So maybe tribrid cars are the next generation? You can bolt solar panels to the roof, for instance.