A method for predicting remaining lifetime of a used and unopened electric vehicle battery, the method comprising: determining, by a diagnostic device, performance data associated with the battery, wherein the battery is operably coupled to the diagnostic device, and wherein the performance data comprises one or more performance parameters; determining, by the diagnostic device, a state of health of the battery, wherein the state of health is based on the performance data, wherein determining the state of health of the battery comprises a calibration operation, the calibration operation comprising: performing a current interrupt operation over a predetermined current interrupt interval to determine an impedance associated with the battery, and wherein the predetermined current interrupt interval is determined by varying an interrupt interval to minimize a magnitude of an internal resistance vector associated with the battery measured during the current interrupt interval, the magnitude of the internal resistance vector corresponding to a scalar measurement of internal resistance associated with the battery; comparing, by the diagnostic device, the determined performance data to stored data, wherein the stored data is associated with one or more deployed second use batteries; predicting, by the diagnostic device, a remaining expected life of the battery based on the comparison of the determined performance data to the stored data; and determining, by the diagnostic device, a set of preferred operation parameters for the battery, wherein the determination is based on at least one of the state of health of the battery and the predicted remaining expected life of the battery. determining, by a diagnostic device, performance data associated with the battery, wherein the battery is operably coupled to the diagnostic device, and wherein the performance data comprises one or more performance parameters; determining, by the diagnostic device, a state of health of the battery, wherein the state of health is based on the performance data, wherein determining the state of health of the battery comprises a calibration operation, the calibration operation comprising: performing a current interrupt operation over a predetermined current interrupt interval to determine an impedance associated with the battery, and wherein the predetermined current interrupt interval is determined by varying an interrupt interval to minimize a magnitude of an internal resistance vector associated with the battery measured during the current interrupt interval, the magnitude of the internal resistance vector corresponding to a scalar measurement of internal resistance associated with the battery; comparing, by the diagnostic device, the determined performance data to stored data, wherein the stored data is associated with one or more deployed second use batteries; predicting, by the diagnostic device, a remaining expected life of the battery based on the comparison of the determined performance data to the stored data; and determining, by the diagnostic device, a set of preferred operation parameters for the battery, wherein the determination is based on at least one of the state of health of the battery and the predicted remaining expected life of the battery.