Long-lasting flow battery could run for more than a decade with minimum upkeep

A newly developed flow battery stores energy in organic molecules dissolved in neutral pH water. This new chemistry allows for a non-toxic, non-corrosive battery with a lifetime up to a decade and offers the potential to significantly decrease the costs of production....
https://techxplore.com/news/2017-02-long-lasting-battery-decade-minimum-upkeep.html