I have a refurbished battery for about a year now and the CAC is worse on this than on my previous 1.5 Roadster. Ideal miles varies from 179-183 and the CAC has gone down from 154.6 in December 2013 to 147.87 yesterday. Tesla SC said that it is because I'm not driving it for long enough distances or frequently enough which doesn't make sense to me. They also said the famous "Bleed Test" did not show any problems with any cells or sheets. Any ideas or should I not be concerned?