The disclosure describes a method for checking the proper method of operation of a current sensor which is designed to measure a battery current. During a precharge phase which begins at a time at which at least one electrical component is connected to a battery and during which the electrical component is precharged by a precharge current, at least one measured value provided by the current sensor is compared with an expected current value determined from an expected temporal profile of the precharge current. The disclosure also describes a computation unit and a battery which are designed to carry out the method according to the disclosure.