Warming up the batteries

[Ether]

Originally Posted by Joe Ross

He said to measure during discharge. The datasheet values are after discharge has stopped.

"He said to measure during discharge." He did indeed. It would still be informative to know where the "10 volts after 15 seconds at 12 amps" rule came from. Is this a home-grown FRC metric based on experience? Or is it published somewhere?

"The datasheet values are after discharge has stopped." The datasheet didn't mention that fact anywhere. I guess this must be a common understanding among those who work with battery specs? It would be interesting to know how long the testing is paused at each datapoint to allow the voltage to rise before recording it. Perhaps that's part of some battery-industry spec. Also, question for Al: in the CBA graph you posted, are the voltages open-circuit voltages or are they volts under load?