Beware of fakes! Tip to detect

Like many buyers here I received a counterfeit battery, and yet I had not purchased from a third party vendor (which I absolutely avoided for this kind of product) but a product sold and shipped by Amazon!
No merchant is protected from a corrupt stock, especially as a result of my complaint Amazon sent me a second copy that was also always a way infringing the same stock. FYI the battery was packaged in a simple plastic bag, which is not normally possible for a genuine product. So I returned all at Amazon (which showed a beautiful incompetence and no professionalism on this issue, it should be emphasized) and controlled the pack "battery + charger" always sold and shipped by Amazon, which was really a he genuine product:; s = & ie = UTF8 electronics & qid = 1409934310 & sr = 1-3 & keywords = + battery + samsung galaxy s4 +

The Samsung service I contacted gave me a tip effect to see for sure if your battery Samsung Galaxy S4 is a counterfeit or not battery.
Besides being often delivered in a simple plastic bag, simply check whether the NFC function in your phone still works with the new battery (by bringing the back of your device to another NFC-enabled phone or a tag NFC, NFC function should obviously be enabled in the settings of your S4).

Indeed NFC technology is integrated into the battery on the Galaxy S4 and that the counterfeiters do not KNOW.

So if your new S4 battery makes you lose the NFC function look no further: it is a counterfeit!
So request a free return and a refund and file a complaint! Counterfeits are dangerous, especially the batteries, they may explode and / or fire!

Feel [...] for the notice that he goes up in the rankings and that this trick is known to the greatest number. Dishonest sellers (and not serious like Amazon on this one) will eventually stop.