Alibaba site, Gina Zhang is the owner, and her family has been in the battery business for years, ( I see new comments on the forum of new members, saying what they think on these cells, but do not know, lol.)
The best way for anyone interested is to check out the site,the information is in it, send an inquiry, or chat and ask them to verify what you want to know.
Gina transfered me to Wendy Leung, and she answered me my question.
We should all know by now that all the cells coming from China at this price range are probably grade AB,
If they sat in the warehouse for a certain amount of time (2-3 month) they are still new grade A, for us but not for the company that's bying them at full price, let's say 300$ and up price.
Catl is a number 1 seller in China, just google search, for me I had learned it through chatting with another company.
And this company when cells are sitting for an amount of time??? , they liquidate and probably as we learn on this forum that the QR original Codes are removed, and being replaced with another code intact. But who knows really.
And does that put this cell in a different category than all the rest of the cells?
If the supplier confirm to you that the information you get from them and there site is accurate and they stand by it, to me that is thrust worthy. And Exliporc new energy, did this verification.
I also have contacted Bason supplier, and chatted with Emily, and she confirmed to me that the information advertised in Web pages of data and warranty was not accurate even though I sent her pages of there own site to acknowledge the information. But I don't want to go any further with this Bason sharing, I don't put a supplier down, because lots of people seem to be happy with them here.
In my final decision making process, I will have a cell with more capacity then 280ah, it's advertised as more than 310ah, better warranty of 5 years confirmed, Qr code intact, not a big difference it depends on the cell manufacturer,
and life cycle of 4000, for just about the same price of the 271,272, 280ah, which are by the way all in the same grading boat, even the new 280ah 120usd$, it just that they are more carefully picked and matched.
Hopefully this helps you out.
Check out this product on Alibaba App Exliporc lithium iron phosphate calb lifepo4 310ah lifepo batery bateria de litio lithim 280 ah 3.2v 280ah lifepo4 battery cell
https://m.alibaba.com/product/1600206686827/Exliporc-lithium-iron-phosphate-calb-lifepo4.html?__sceneInfo={"type":"appDetailShare","data":{"filterKey":"7.8.2_share","cacheTime":"1800000"}}View attachment 45078