4 ms·
Yes, there's that Examiner article claiming 50% drainage. But look further and you'll learn that in Android, at least, NFC polling is off when screen is off or
by blisterpeanuts 13y ago
Yes, there's that Examiner article claiming 50% drainage. But look further and you'll learn that in Android, at least, NFC polling is off when screen is off or locked, and when screen is on and the NFC subsystem is active, it polls intermittently at a very low frequency of about 10 Hz to save power. Google I/O had a discussion of this (sorry I don't have the link) and they reported about a 0.5% power consumption hit when NFC was on. It definitely hits the battery but negligibly. I have NFC turned on all the time on my devices (GNex, N7, N4) and they run for 12 hours (about 30-50% usage rate).