Myth of the USB cable and the long load times

Since my data link charging cable from Samsung after a short time had a loose connection I needed a new one.
The new cable should be longer. In my research I have come among others, on the idea that not every USB cable would be appropriate because the

For the charging time would double, to not even hold a charge the phone overnight or even the battery discharges when it during

Used charging.

Only rarely will this address the components used like: Used Charger, exact name of the USB cable (model, manufacturer, etc.) and

of course the phone: age of the battery, the number of loads, active programs within the phone.

Also seems to ignore that only conditionally can use for other devices just happens to a charger that is suitable for Apple - Apples are just apples and the rest the world.

With regard to the 1.8m long cable I have performed 2 simple tests.

Hardware:

Samsung S4 Active, 3 weeks old
original charger, 2A
Original USB cable 80cm long
Amazon USB cable, 1.8m long

Settings on the phone: switched energy saving on, 3G, average signal strength, WLAN, GPS off, display off.

The phone had a rest period of 51% in both tests.
Loaded exactly 60 min.

With the Amazon USB cable the phone has charged for 60 minutes on 95%.
With the original Samsung USB cable, the phone has charged for 60 minutes on 95%.

Result: Irrespective of the cable length, the cell phone was exactly charged the same rate.

At this point I would like to say that it matters which charger is used for his cell phone - regardless of whether the mains or at the car-board network:
It depends not only on the amperage of the charger but also whether this is compatible with his cell phone.
So can the 2 amps without additional description Charger with 2 amps - as long as an Apple device is tuned. If a mobile phone from another manufacturer charged the probability is quite high that this is only charged with 0.5 Amp. This is also true vice versa.
The culprit is according to my research, the wiring of the output USB port.