There is a report on sciencealert.com about a small device that is reported to generate electricity “out of thin air”. It consists of “bacterial nanowires” that conduct electricity. When stacked, the device should be able to power small devices like smartphones. If this works as claimed, it would be a little overuntiy device. Of course they cannot say this so openly in the conventional scientific community. However, it would be a break-through in energy supply on this level.