This could be a good stepping stone towards creating DIY batteries that have a useful level of power storage. Seems to tick a lot of boxes; cheap, abundant mate

This could be a good stepping stone towards creating DIY batteries that have a useful level of power storage. Seems to tick a lot of boxes; cheap, abundant materials, non-toxic. Whilst it's not likely to be a good fit for all cases, it could help the growth of off-grid energy solutions, as well as being an interesting science project.