HAKADI Sodium ion 18650 3V 1500mAh Battery Original Na ion SIB battery Rechargeable Cell For E-bike Power Tools DIY 12V 24V 48V 72V Battery Pack

Price is very good with larger batches beeing under 2 USD per battery, shiping was quite fast (10 days to Europe) and shipping included, but tracking could be better, I recived the tracking information but it never updated and after 10 days I suddenly got the batteries in hand.
Packeging was ok, they were packed in pairs of 4 (ordered 16) and the 4 packs were wraped in an additoinal bubble wrap with the usual plastic bag covering. But the 4 Packs only were litght cardboard boxes.

They look like your standard 18650 cells and also feel like that, the wraping has no faults. The cells come precharge to ~3V which is roughly 45-50% SoC.
All cells have lower than 20mOhm internal resistance which is up to the specs on the Website, the worst are roughly around 19,5 mOhm, best are at 16,9mOhm, the majority of them are around 17,5mOhm.
The charge/discharge curve also shows that this cells are genuine Sodium cells.

Now the not so nice part, I have tested half of the cells and their capacity is roughly around 1250mAh (see 3 examples).
While this is no problem for the project I intend to use them (low power lora node with solar backing), its always kind of a bummer to see devices not lifing up to the specs. Just sell them at 1250 or 1300mAh and its good enough. A loss of 20% capcity is ususally not accaptable compared to a 4% loss when you would advertice tham as 1300mAh.
I tested discharge with 0.2C and 0.5C and 0.66C (aka 300mA, 750mA and 1A) and the capcity is virtually the same in all.

Would I order again? Maybe, now that I know the real capacity you need to plan a bit different.

With that said I would give 3.5 Stars, the misslabled capacity is qutie the bummer and I can't justify giving 4 stars (aka rounding up) so I gave 3 stars, but everything else seems to be in order. The cold weather performance will be tested in the future.

Summery:
Pro:
Quite ok price, less than 2USD, even better for larger batches + shipping included
Delivery time (less than 10 days)
Cell resistance (less than 20 mOhm)

Neutral:
Standard packaging, suficient for normal shipping, could be better and I have seen worse.

Negativ:
only ~1250mAh capacity instead of adverticed 1500mAh

HAKADI Sodium ion 18650 3V 1500mAh Battery Original Na ion SIB battery Rechargeable Cell For E-bike Power Tools DIY 12V 24V 48V 72V Battery Pack

Excellent cells and great service from Hakadi :-))

Products are great, shipping approx 2 weeks

HAKADI Sodium ion 18650 3V 1500mAh Battery Original Na ion SIB battery Rechargeable Cell For E-bike Power Tools DIY 12V 24V 48V 72V Battery Pack