I can assure you that the capacity is a minimum of 2450mAh, but it may be necessary to discharge them up to 2.5v, and it really, not 2.8v!!! I have 4 Samsung INR18650-25S cells of the same batch as HKJ (2H44) and I discharged them with 0.5A, from 4.20v (real) to 2.50v (real) (just put an amp cut-off setting to 0.01A for that), I got the following results:
@Hydraxx, no worry here. 2.8V is used here since most devices won’t draw the cell down to 2,5V, so using 2,8V is more accurate for capacity measurement
As long as the difference in capacity is not higher than 10%, I have no problem believing the cell is a step-up from the VTC5A in terms of internal resistance.
I meant that VTC5A offers higher capacity, not that these don’t meet their specs (though I do believe that rating capacity and durability in different discharge cycles is a scam that everyone does).
I agree that most devices are not capable or are not tuned to use Lithium-Ion cells up to 2.50v, that’s quite true. But I do not agree, on the fact that you say that unloaded up to 2.80v is an accurate measure of cell capacity, Lithium-Ion cells are created and designed initially to be discharged up to Voltage Cutoff defined by the manufacturers and it is not the fault of the marks of cells, if the manufacturers of devices using them do not know the exploited correctly, all is always question of adjustments, and of course to know made adjustments . So for me, I mean for me, performing a capacity test of a cell correctly, it is discharged properly, through (2.50v). And of course, there is always a difference between theory and practice.
Looks this is the next generation of 20Q and 20R.
Samsung did a good job on this one.
Can’t wait to see these in power tools.
@HydrAxx - Do we consider cheating if manufacturer states the total capacity considering a discharge of under 3.3V ? I think we mostly should, if this is the case … and this is because any tools were designed to consider this limit. So it’s not fair to rate a cell 3400 instead of 3100mAh just because it can go under 3.3V while sustaining the specified current. At least this causes additional wear.