You're right, that's why I'm sceptical. I think it may work as a last resort (e.g. I forgot my power adapter at home), when camping/traveling or in poor countri

You're right, that's why I'm sceptical. I think it may work as a last resort (e.g. I forgot my power adapter at home), when camping/traveling or in poor countries with no electricity grid. The problem is with such marginal and cost-sensitive usage scenarios who will be compelled to develop it in the first place? In poor countries they use simple dynamo machines to power the cell phones afaik. I think realisticaly there is a point for a special traveler's cellphone - take one with you when going hiking and know that you will be able to call help no matter what happens. That sort of thing.