![](/static/c15a0eb1/assets/icons/icon-96x96.png)
![](https://slrpnk.net/pictrs/image/0776b49d-f821-425f-8f5f-dd9d284334b6.png)
Judging from that graph, it looks like the sodium ion batteries are about as energy dense as Li-ion was in 2020, which is far from useless. Li-ion may still be the best but at a point, there’s “good enough” for many applications (eg cellphones) if the price is low enough.
For single files, I use qrcp