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Details
B grade: damage to wrap possible, cells not matched, not advised for EV but fine for ESS projects.
Additional Information
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Reviews
Customer Reviews
- Brilliant Products and Service Review by NeilD
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I have bought 16 of these and a great product, had an issue with one of the batteries and the support and service were fantastic, the only place to get your batteries. (Posted on 03-05-24)Rating - Excellent capacity Review by Sellman
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Ordered 16 cells for 16s 48V battery. Out of the box within good voltage range. I skipped initial top balance and just compressed and installed them in my custom battery case. I let BMS handle top balancing by itself and after a week all cells were idle at 3.42V. After installation in my system I can pull 111Ah before I reach 51V which means that the total capacity is about 135-140Ah. That is damn good and clearly better rated than advertised. Shipping was fast and all cells were new, showing no signs of tear and wear. Awesome deal. Thanks (Posted on 22-09-23)Rating - Not bad cells 135Ah measured Review by Tomas
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Not bad cells. Internal resistance differs, so from 8 ordered cells, 3 of them always charges fastests and limits charge for others. Received batteries from nkon with measured, by them i guess, capacity. Capacity they measured was 130-135Ah. I did not test capacity.Rating
Had very small costemic imperfections. I see that price since when i've bought (2months ago) have fallen by 10 euros, so these cells are even more atractive offer than before! (Posted on 15-06-23) - Very good quality Review by Viktor
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Perfect condition, could not see any obvious reason for them to be B-grade. Not even cosmetic imperfections. All came neatly packed with matching voltages. (Posted on 21-03-23)Rating - CALB L173F125A Review by Yuriy
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Excellent product. (Posted on 14-03-23)Rating
Write Your Own Review
B-grade cells are cells usually did not qualify as A-grade by the manufacturer. This may be due to optical imperfections, higher self-discharge, lower capacity and/or higher internal resistance. Unfortunately manufacturers don't tell which aspects or aspects are the reason to mark a a specific cell as B-grade. We have sold several and get seldom negative feedback. We tested several eve B-grade and one had about 2% lower capacity, the other ones we did not find a difference with A-grade cells. We don't advise B-grade for high performance electric vehicles but for home energy storage they will work fine. In case you get one which performs significant less than the others like lower capacity, high self-discharge or fast wear we will replace it. Take care that we don’t put a lot of trust in a simple test of a single cell, if you buy 16 cells and you test them and they are all 6% lower than expected then your test gives to low results. If you buy and test 16 and 15 cells give you 100% and one cells gives 5% lower results then we will replace one. When we buy cells the cells are tested for voltage and internal resistance. Also a couple of every batch are tested for capacity, and if one gives less than 100% capacity we test the whole batch and discard the bad ones or don't buy the batch at all. Lot of seller in china buy B-grade cells, test them, even swap qr-codes and sell the good looking and performing as A-grade cells. We believe our B-grade cells are the same as lot of A-grade cells from China, including the well known resellers there with good reputation. We give regular warranty on these cells (at least 2 year).
