A sodium battery listing should be treated like any other energy product: verify the numbers, identify the manufacturer and understand the system around the cells.
Look for usable capacity, rated current, BMS limits, charge-voltage guidance, temperature range, cycle-life test conditions, certification claims and replacement support. If any of those are missing, the product belongs on a watchlist rather than a shortlist.
Referral deals can still be useful, but they should not soften the review process. The buyer needs to know when a link is commercial and when a product has not yet been independently tested.
