This article posted to the UK paper, The Telegraph, and covered by slashdot, indicates some new technology for making sustainable battery technology.
The cells are charged in a traditional way but as power is used or 'discharged' an open mesh section of battery draws in oxygen from the surrounding air.
This oxygen reacts with a porous carbon component inside the battery, which creates more energy and helps to continually 'charge' the cell as it is being discharged.
The applications are in longer-lasting batteries and smaller battery payloads needed to support an electric device, whether a cell phone or a car.
[link] to the article
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