Lets do the math:...
Well, none of the values used in your math is real. So the result is not meaningful.
Well first off, the only results I noted is the charge cycles. The number I started with IS real. The 35K miles is what the odometer in the Leaf stated from the ebay seller. And that number you cannot prove is any less. But you cannot prove is anymore either. We are going to have to take the seller's words for it.
My point on the math is to reply your other point on how you were disappointed about the battery. Well I would love to see something with similar specs in capacity, power, weight, etc. do better noting the charge cycles on the battery.
Let's see RC lipo perform similarly after 350 cycles, let alone the more realistic number of 700 cycles on this pack. I doubt even RC Lipo will last this number of cycles before it sags much worst. The chinese LiFePo4 I played with crapped out < 200 cycles. Sure they were not A123 cells. But keep in mind the ability to obtain them at reasonable cost like icecude did here. I don't have Enerdel's NMC, EIG lipo, Kokam Lipo, or other legit cells. So I cannot comment on them. But then again who actually has numbers that prove they perform any better after 350-700 cycles on them. I suspect they do better, but by how much? You should also keep in mind the price. If you don't, then I can say I get the best cells right out of research lab with the best specs... but at what cost?
My conclusions is the results icecube put out is:
icecube57 wrote:I think this came from a leaf with 35K which sounds about right from what I read.
So it's expected. If you did expect something better, then I guess you will be waiting for a few more years.
mistercrash wrote: I'm used to see the voltage coming down fast at the beginning to a certain point then hit a plateau for some time until it drops down at the very end of the discharge.
Only LiFePO4 have those characteristics.
mistercrash wrote:And 28.9Ah out of 33.3Ah is something like only 87% of the rated capacity. I don't think anyone would be happy buying A123 pouches rated at 20Ah that only give 17.4Ah.
A couple of things to note even though it might not make much difference.
1) icecube tested them at 20A which is 0.6C vs what the specs used which is 0.3C. He did mentioned you get 200mAh more. So that makes it 29.2Ah
2) he also stopped at 3.0V, while, the specs stated you can go all the way down to 2.5V. He did say he got 666mAh more stopping at 2.75V. Let's make it 667mah
. So that makes it 29.8Ah.
So 29.8/33.1 = 90%.
Finally keep in mind these came from a 35K Nissian Leaf. This equates to around 350-700 cycles on the battery already. Since these are rated at 60K miles before 80%, I say these number are right and expected. I don't have A123 cells, but I would love to see someone's prismatic A123 20Ah cells number after 350-700 cycles to see if it's above or below the 90% capacity like these cells.