There are sodium ion batteries available at aliexpress. The claimed advantges (written in an unintentially comical way) are: - better safety - same number of

There are sodium ion batteries available at aliexpress. The claimed advantges (written in an unintentially comical way) are: - better safety - same number of cycles as LiFePo - much better capacity at low temperatures - protects environment (?) I would take that with a truckload of salt. Also, price is roughly 50% higher than LiFePo. On many product images there is an outdoor winter scenery. So performance at very low temperatures seems to be the main selling point.