Power pack partial failure detection and remedial charging control

Systems and methods to detect a failure of a subset of component power packs within a multiple component rechargeable power pack. At least one parameter of a charging current that is provided for a time duration to a rechargeable power pack is determined (302). A measured capacity change quantity for the rechargeable power pack during the time duration is estimated (304). The measured capacity change quantity is compared, after the time duration, to an expected capacity change quantity that is based upon the at least one parameter (306). A determination is made that at least one component power pack within the rechargeable power pack has failed based on a difference between the measured capacity change quantity and the expected capacity change quantity (308). A charging current parameter is modified in response to the determining that the at least one component power pack has failed (312).