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. <EOS>