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 (Q6) of the first analog ping and the transmission quality factor (Q7) 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 (Q7) of the stronger analog ping is lower than the transmission quality factor (Q7) 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 (Q) after the stronger analog ping is not smaller than the transmission quality factor (Q) 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 (Q6) of the first analog ping and the transmission quality factor (Q7) 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 (Q6) of the first analog ping and the transmission quality factor (Q7) 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 (Q7) of the stronger analog ping is lower than the transmission quality factor (Q7) 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 (Q) after the stronger analog ping is not smaller than the transmission quality factor (Q) 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 (Q) after the stronger analog ping is not smaller than the transmission quality factor (Q) 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 . <EOS>