Oregon2000 stopped by today, so we took his car for a spin. I can confirm the altered driving style. It took me approximately 1.5 miles to trigger the negative recal, and despite somewhat gentle charging, resulted in a positive recal and IMA light a few miles later.
The battery was very weak, dipping well below 100V under full assist. The batteries internal resistance calculates out to 0.55 - 0.65 ohms. In comparison, a brand new MaxIMA
battery is ~0.25 ohms and a refurbished Honda battery about 0.35 ohms.
We pulled approximately 400mAh (0.4 amp hours) out of the battery before the negative recal. Surprisingly, this didn't trigger the IMA light. I suspect this is because it had been a long time since the last recal. However, inputting only approximately 650mAh (0.65Ah) before the positive recal did trigger the IMA light.
Here's a graph of the results with some highlights pointed out.