After some strange errors and a sudden CAC drop, my local service center diagnosed a failed sheet in my battery. After two weeks in a Model S loaner, I got "Sparky" back, but was surprised that the CAC value was still as low as when it when in for service. Now, I'm not sure if this is just an old, refurbished battery with a lower capacity, or if the CAC was linked more to the car (or PEM?) than to the battery. After two range-charge, single key-turn drives down to less than 10%, the CAC seems to be recovering slowly, a little at a time. So far, I've been disappointed with the range; I had to slow down dramatically in order to make it home on that single charge. Now, my question is, for anyone who has had a battery replaced, did the CAC change immediately, or did it take a little while to recover?