Method for detecting the presence of a portable object near a charger inside a vehicle, the detection being achieved by - transmitting with at least one coil a first analog ping, characterized by - transmitting with at least one coil a second analog ping which is differently strong than the first analog ping, - comparing the transmission quality factor of the first analog ping and the transmission quality factor of the second analog ping, - deciding that a portable object is present which is a mobile phone and/or a portable object with a wireless charging coil if the transmission quality factor of the stronger analog ping is lower than the transmission quality factor of the other analog ping, - deciding that a portable object is present which is not a mobile phone and/or a portable object with a wireless charging coil if the transmission quality factor after the stronger analog ping is not smaller than the transmission quality factor of the other analog ping, - sending with at least one coil a digital ping only after a decision that a portable object is present which is a mobile phone and/or a portable object with a wireless charging coil, wherein the digital ping, if sent, is stronger than the first analog ping and stronger than the second analog ping. the detection being achieved by - transmitting with at least one coil a first analog ping, - transmitting with at least one coil a first analog ping, characterized by - transmitting with at least one coil a second analog ping which is differently strong than the first analog ping, - comparing the transmission quality factor of the first analog ping and the transmission quality factor of the second analog ping, - deciding that a portable object is present which is a mobile phone and/or a portable object with a wireless charging coil - transmitting with at least one coil a second analog ping which is differently strong than the first analog ping, - comparing the transmission quality factor of the first analog ping and the transmission quality factor of the second analog ping, - deciding that a portable object is present which is a mobile phone and/or a portable object with a wireless charging coil if the transmission quality factor of the stronger analog ping is lower than the transmission quality factor of the other analog ping, - deciding that a portable object is present which is not a mobile phone and/or a portable object with a wireless charging coil if the transmission quality factor after the stronger analog ping is not smaller than the transmission quality factor of the other analog ping, - sending with at least one coil a digital ping only after a decision that a portable object is present which is a mobile phone and/or a portable object with a wireless charging coil, - deciding that a portable object is present which is not a mobile phone and/or a portable object with a wireless charging coil if the transmission quality factor after the stronger analog ping is not smaller than the transmission quality factor of the other analog ping, - sending with at least one coil a digital ping only after a decision that a portable object is present which is a mobile phone and/or a portable object with a wireless charging coil, wherein the digital ping, if sent, is stronger than the first analog ping and stronger than the second analog ping.