Abstract: A method for changing a transmission ratio of an electrically controllable gearing of a bicycle, in particular of an electric bicycle, includes (i) measuring a pedaling frequency of the bicycle rider on the pedal shaft, (ii) measuring a pedaling force of the bicycle rider, and (iii) determining a gear change operating state on the basis of the measured pedaling frequency and on the basis of the measured pedaling force if the measured pedaling frequency is less than or equal to a lower frequency threshold value or is greater than or equal to an upper frequency threshold value, and/or the measured pedaling force is less than or equal to a lower force threshold value or is greater than or equal to an upper force threshold value. After determining the gear change operating state, a control signal is generated for the gearing according to the determined gear change operating state.

Abstract: A method for wireless time synchronization of a first electrical unit with a second electrical unit is disclosed, which can in particular be intermittently wirelessly connected to each other, in particular via a low-energy connection, wherein the first electrical unit includes a first time counter and the second electrical unit comprises a second time counter, and wherein a connection event occurs repeatedly at predetermined connection time intervals.

Abstract: A method and apparatus for testing an operating method, in particular for an electrical energy store, having the temporally successive method steps of: wherein the operating method is defined in a first method step, wherein a simulation of the operating method is created in a second method step, wherein the operating method is applied to a test object in a third method step, wherein at least one state parameter of the test object is detected, wherein the state parameter of the test object is evaluated and compared with the simulation in a fourth method step.