Hii ndio charger yenye uwezo wa kucharge simu kwa kikombe chenye kinywaji cha moto au baridi.

A mobile phone charger that can be powered by either a cold beer or a hot coffee has been unveiled.
The Epiphany One Puck, which doubles as a drinks coaster, connects to a phone with a USB cable.
It has two sides, one red, one blue.

By Feb 8, more than £25,000 (pounds) had been raised, and early birds can still get in for a £62  pledge price.
The regular pledge for a Puck will be £73.

Tim Joseph of Epiphany said: 'We called it Puck because of its shape.

The blue side can be used as a coaster for a cooling drink such as a beer

'We added "onE" Puck not only to imply that it is the one solution to this problem, but also to go with our ongoing theme that Epiphany has onE vision for onE world that we all share.
'The onE Puck is a neat gizmo for cell phone users, but the implications of this project are much farther reaching than just cell phones.
'Once we have this project off the ground, we'll get to work on larger scale versions of the onE Puck that will provide inexpensive power to households and villages using nothing but waste heat as the energy input.
'There's nothing new about the idea of using Stirling engines to do that, but no one has ever successfully brought them to market in an affordable package.'

Any source of heat that can fit on the Puck will work, although the firm says it works best with something that's very warm like a steaming cup of tea or coffee

The gadget is simply flipped over to use the 'cold' side to create energy when needed