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  1. cell_man

    Testing the big 15 and 20Ah LiFePO4 cells is tough! *Pics*

    I've just made a video that I'm currently trying to upload that shows a cell with over 400A initially and then sustained until the cell is virtually discharged. Initial voltage with over 400A is over 2.5V. As the cell discharges it drops to just under 2.20V and then rises again as it gets some...
  2. cell_man

    Testing the big 15 and 20Ah LiFePO4 cells is tough! *Pics*

    I hope so. You said before shorting the test cell etc, don't you mean after? Anyone that looked at the values on those videos would rightly believe that the cells are nothing more than fairly reasonable but not particularly special cells. All my tests were done using off the shelf test...
  3. cell_man

    Testing the big 15 and 20Ah LiFePO4 cells is tough! *Pics*

    Fellas, I've only just viewed the video that was previously posted and I can state with 100% certainty that cell is not functionaing correctly. All the cells I have checked have had less than half the voltage sag that cell is displaying for a given current. Here are 15Ah tests again but...
  4. cell_man

    Testing the big 15 and 20Ah LiFePO4 cells is tough! *Pics*

    Thanks Mitch, I might hold off on it for now, but I'll need something soon. I can get a professional version of the CBA with 2000W capacity, but that's not really enough for a big assembled pack. Is there any way to use something like the CBA in series with a large resistive load, so that the...
  5. cell_man

    Testing the big 15 and 20Ah LiFePO4 cells is tough! *Pics*

    Thanks fellas :) I hope my comments were not taken as any form of critism for Lukes great effort to get these cells tested for which I am eternally grateful. It's just that some are taking figures out of context and making incorrect assumptions IMO. I have every faith in these cells, that is...
  6. cell_man

    Testing the big 15 and 20Ah LiFePO4 cells is tough! *Pics*

    I'm going to get 10pcs of A123 26650s and do some comparisons myself. I'll happily give specifics and take a video and forward to anybody to be posted on youtube or whatever. I thought my images already posted using a resistive load would give some idea of the cells capability but I'm now...
  7. cell_man

    Testing the big 15 and 20Ah LiFePO4 cells is tough! *Pics*

    I've tested many of these cells and they all have performance which is far above the above figures when measured on my resistive load. I've already posted lots of pics of the cells under various load conditions. Also I have been instructed that these cells should never been loaded to under 2V so...
  8. cell_man

    Testing the big 15 and 20Ah LiFePO4 cells is tough! *Pics*

    Thanks :wink:
  9. cell_man

    Testing the big 15 and 20Ah LiFePO4 cells is tough! *Pics*

    Looking Good Luke :mrgreen: You're the man :mrgreen: Yeah it's not easy is it.... I was only messing with resistors and even that was a real PITA. I can't see any of the pics or the vids (must be blocked by the Chinese firewall) but it sounds very very good. I've pulled out random cells...
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