Attempting to revive dead 260 AH LiFePO4 Cells
I now have both of Willie's 12V wooden power boxes containing mostly dead 260 AH LiFePO4 cells, plus a spare cell. The 4 cells in the box I got yesterday are all dead, reading only a few millivolts. Since Scott Little and Willie had previously worked with a load of dead cells from the Escort, I looked at his messages, and here is what I found (so far): Mar 31, 2018, 1:28 PM to William , me I have not had good luck so far with the super-dead 260’s…ones that have <0.01v initial voltage. I first tried a 50A charge rate and that cell got up to 3.3 volts but hung there and started to get hot instead of going up to 3.7. I disconnected it and, by the next morning, the voltage was less than 1 volt just due to self-discharge. A second 260 was charged with a constant-current supply set to 10A. After the voltage got above 3.0, I disconnected it and observed a similar self-discharge rate. I then charged it again to 2.7 or 2.8 and disconnected it a