For monitoring a battery status of a battery included in a mobile communication device (1), battery status reports are received (S12) in a computerized service unit (2) via a mobile radio network from the mobile communication device (1). The battery status reports include at least an electrical battery parameter indicative of a current charge or voltage level of the battery. Based on the battery status reports, received from the mobile communication device (1), battery data is stored (S17) in the computerized service unit (2), the battery data including at least a time series of the electrical battery parameter. Using the battery data, determined is a deviation of a battery parameter, included in the battery status report, from an expected value of the battery parameter derived from the battery data.