When I plug it into my Samsung charger (the wall wart) it indicates on my phone that an adaptive fast charging charger has been detected.
When I plug in my iPad wall wart it does not give the notification, but charges just as quickly. That makes me wonder if it will stop fast charging at the eighty percentile mark and reduce back down to the trickle charging or will it keep giving the gas all the way to 100 percent?
I would guess it'll keep giving 'er til the end. One reason why they suggest not using other chargers.
Sent from my Note 4
I would tend to agree with
@Jonny Kansas , and furthermore I would bet that the temperatures of the battery will be hot for a greater range of the charging curve, however may not reach the high temperatures that the "Adaptive Fast Charging" wall wart my produce.
The current is only part of the equation. The voltage is another. In at least the Qualcomm QuickCharge 2.0, there are two higher voltages and current levels that trigger the QuickCharge 2.0 process. In the case of the iPad charger, it may produce 2.1A, but it's still at 5V, so it will not trigger the algorythm for the Adaptive Fast Charging on your device (as you've confirmed), and won't start QuickCharge 2.0 (or 1.0), on mine. Charging at higher voltages "pushes" the charging process, whereas charging at higher currents only "allows" the battery to take current as fast as it can electrochemically can process it. Higher voltages will increase the temperature much quicker, but the algorythm may be set to "burst" the higher voltages for short periods of time, then fall back to the lower voltages so it can pull the higher current levels.
I really don't know all the inner-workings of the process, and I'm sure that neither Qualcomm nor Samsung want us to know (patented processes), but I would have to guess that even though it SEEMS to charge at the same rate with the iPad charger as it does with the stock Adaptive Fast Charging wall wart, it probably doesn't charge at the same rate through the entire curve of charge. In other words, the Adaptive Fast Charging (and also the QuickCharge 2.0), process is designed to pump large amounts of current into the battery over a short period, but in the case of a full charge, they will both result in reaching 100% charge at about the same time as a standard high-current charger will. It's not how fast it charges completely, but how fast it adds a large percentage through the middle of the charge curve that's going to be the most significant difference.
For instance, Turbo Charging is advertised as being able to pump 8 hours of power into the Droid Turbo in only 15 minutes. I guarantee you that the iPad charger will not do that for my Droid Turbo. It most likely will not do that for your Samsung device either.