the invention relates to a circuit apparatus for the charge and discharge monitoring of electrical accumulators or accumulator cells connected to one another in series to a charging current source . the apparatus includes one monitoring module for each accumulator , or for each accumulator cell , with the monitoring module having a charging current limitation circuit and a first signal generator for displaying the operating state of the charging current limitation circuit . the charging current limitation circuit is acted on in dependence on a temperature signal corresponding to the temperature of the accumulator , or of the accumulator cell . a control signal circuit is connected to the first signal generators , with the output signal of the control signal circuit being applied to the charging current source in order to control the charging current delivered by it .