I want to point out that here some fake China power supplies are sold.
See my uploaded by comparing the original power supply and power supply fake.
These fake power supplies never reach the 2A during charging.
With the App Galaxy Charging Current "you can convince yourself the way.
These power supplies provide just 300-400ma and S4 thus takes about 5 hours to recharge it is!
The original power supply reached the 2A when charging.
One can recognize the fake power supplies in the following locations (see photo).
1. The Samsung Logo easily covers the font.
2. dates far back, z. B. 08-2012 (since there was no S4)
3. Information on the power supply are positioned differently than the original.
4. The plastic braces before the contacts are slightly wider
In the China power supplies ALWAYS Furthermore missing the original packaging! That is why it is often called also bulk ".
Therefore, I advise the PSU possibly only from Amazon to buy directly (and sold by Amazon ").