Monitoring Voltage Measurements for a Vehicle Battery

A server () arranged to automatically detect replacement of a vehicle battery () associated with a vehicle engine () comprises: a communications device () configured to receive vehicle battery voltage measurements from a telematics device () connected to or incorporating a voltage monitoring unit for the vehicle battery (); and one or more processors () configured to process the vehicle battery voltage measurements. The processor(s) () monitor the voltage measurements in a first time window corresponding to an engine off state and assess when the voltage measurements in the first time window indicate a step change in voltage magnitude at a given time. The step change is then used to automatically identify a vehicle battery replacement event.