http://www.androidcentral.com/psa-chip-your-battery-not-government-surveillance
... all it would take to get someone worried about NFC is a reasonable-ish theory about government surveillance and a narrative that suggests the technology is being hidden from you somehow.That's exactly what is happening on Facebook right now, thanks to a video making the rounds detailing a "disturbing discovery" under a Samsung battery.
...don't try to pull the sticker off of your Samsung battery. Don't let anyone you know try it either, the risk for accidentally puncturing your battery is just too high. That chip is not harvesting your data in any way...