It doesn't fit into the list as a revolution (or even 'evolution') as it's just a high-density, compact and cheap battery [1] that turns out to be quite unsafe

It doesn't fit into the list as a revolution (or even 'evolution') as it's just a high-density, compact and cheap battery [1] that turns out to be quite unsafe [2]. [1] https://news.ycombinator.com/item?id=45322135 https://news.ycombinator.com/item?id=45322135 [2] https://news.ycombinator.com/item?id=46071317 https://news.ycombinator.com/item?id=46071317