I couldn’t make Dr. Prius see the OBDLink CX (to be fair, I couldn’t find any evidence that Dr. Prius supports it), so I tried the free version of Car Scanner instead. It worked perfectly, and if I’m interpreting its results correctly, the hybrid battery in the Prius is in good shape (all 14 cells have nearly the same voltage and very low internal resistance (0.03 ohms)).
I was so impressed by Car Scanner that I splurged $6.99 for the pro version. 😄