A system for indicating information representing battery status of an electronic device, the system comprising: - a charging unit comprising: - charging means for wireless charging; - wireless communication means (404, 406, 408, 410) for communication with the electronic device; and - indication means for indicating information representing the battery status of the electronic device; - the electronic device without means for indicating information representing the battery status of said electronic device, the electronic device comprising: - a rechargeable battery; - charging means for wireless charging; and - wireless communication means (304a, 304b, 306, 308, 310) for communication with the charging unit; wherein, during the wireless charging of the electronic device: - the electronic device is configured to detect information representing the battery status of said electronic device and to communicate the detected information representing the battery status to the charging unit, and - the charging unit is configured to receive the information representing the battery status from the electronic device and to indicate at least part of the received information representing the battery status of the electronic device, wherein the wireless communication means of the electronic device comprises an infrared, IR, transmitter (304a, 304b) and the wireless communication means of the charging unit comprises IR receiver in order to communicate the information representing the battery status from the electronic device to the charging unit, characterized in that the IR transmitter (304a, 304b) of the electronic device is an infrared LED, IRLED, configured to be used as an optical emitter for an optical sensor, when the electronic device is not charging. - a charging unit comprising: - charging means for wireless charging; - wireless communication means (404, 406, 408, 410) for communication with the electronic device; and - indication means for indicating information representing the battery status of the electronic device; - charging means for wireless charging; - wireless communication means (404, 406, 408, 410) for communication with the electronic device; and - indication means for indicating information representing the battery status of the electronic device; - the electronic device without means for indicating information representing the battery status of said electronic device, the electronic device comprising: - a rechargeable battery; - charging means for wireless charging; and - wireless communication means (304a, 304b, 306, 308, 310) for communication with the charging unit; - a rechargeable battery; - charging means for wireless charging; and - wireless communication means (304a, 304b, 306, 308, 310) for communication with the charging unit; - the electronic device is configured to detect information representing the battery status of said electronic device and to communicate the detected information representing the battery status to the charging unit, and - the charging unit is configured to receive the information representing the battery status from the electronic device and to indicate at least part of the received information representing the battery status of the electronic device,