My new Samsung SGS3 is equipped with Near Field Communication, which allows the phone to read a unique RFID code wirelessly from a nearby physical tag. The tag doesn't have any power source. Does constantly listening for an RFID tag drain my battery significantly?
I am trying to make a cost benefit decision about employing NFC. The cost is the battery consumption and benefit is the added NFC capability. I am also interested to learn more about how NFC and RFID work.