Description
Details
Max discharge rate: 280A
Size: 72 mm x 207 mm x 174,5 mm without terminal!
The cells have a lifespan (up to 80% capacity) of 9000 cycles when used at a pressure of 280-320kg and charge at 0.5P up to 3.55V discharge at 0.5P to 2.8V
P is comparable to C, 0.5C means a constant current discharge so that the battery is depleted in 1/0.5=2 hours.
0.5P means a constant power discharge so that the battery is depleted in1/0.5=2 hours
As voltage drops during discharge 0.5P discharge has little lower current than 0.5C when state of charge of the battery is high and higher current when battery is getting depleted.
Capacity tested
Nominal capacity 280Ah. All cells from this batch are tested above 300Ah! Average capacity 306Ah. Capacity report available. (Test is done in November, if you test them yourself you will find probably slightly less Ah. Degradation of lifepo4 cells is strongest first months, after that it gets less)
Additional Information
Details
Reviews
Customer Reviews
- between 306ah and 312ah for 16 cells Review by Gabriel
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Pretty good packaging, evrything works as expected, until now.Rating
no deformation and all cells were pretty close in volatage.
needed 20H of balancing with 3A for 16x300ah, not that long. (Posted on 24-05-23) - Good cells, nice price, delivered to Ukraine in 2 weeks Review by Ihor
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Received 8 cells, tested them with charge up to 3.65V and discharge up to 2.8V. I got 302Ah in 4 cells and 304Ah in the other 4. I think that if I discharge to the allowed 2.5V, it would be even more, but it makes no sense, because it is clear that the cells are good and I don't want to damage them with a deep discharge. Cells have no geometric deviations. (Posted on 26-04-23)Rating
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Take care
- Li-ion batteries can be dangerous when used wrong, short circuit or wrong usage can lead to fire or an explosion
- Do not put the battery in a charger or equipment with wrong terminals connected
- Never short cut the battery. Take care you don’t short cut it accidentally, do not put it in your pocked together with bunch of keys
- Do not disassemble or deform the battery. Dispose it if the battery is deformed
- Do not immerse in water
- Avoid excessive physical shock or vibration
- Do not expose to, dispose of the battery in fire
- Keep out of the reach of children
- Never use a modified or damaged charger
- Do not leave battery in charger over 12 hours
- Store the battery in a cool, dry and well-ventilated area
- Dispose of in accordance with local regulations
- Do not solder on these cells
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).
