how far can nfc on mobile phone read rfid tags

I google on the internet and find that nfc on mobile phone is said to be able to read rfid tag (HF tag). Does anyb开发者_高级运维ody test how far it can read RFID tag, or what's reading range for RFID tag? Is it possbile to read RFID tags within 1 meters?

My informal test just now, with the Nexus S, resulted in a read distance of about 2 cm, maybe a little more, but not much. A larger read distance would probably drain the battery quite fast.