Can I charge my smart watch with a low voltage adapter?

Question

Samsung

Good day.
The question is next. There is a smart watch gear s3 with the original docking station, but without a native adapter.
There are adapters for 18W and 33W (which are clearly better not to be connected to the station) and there is a powerbank that produces a voltage lower than the original adapter. The charge with its help occurs, but what can this turn into in the future and how much does it affect the device?

by the numbers, the following values ​​​​are written on the PB (there are two outputs) out1 / out2: 5.1V = 2.4A 9V = 2A max 12V = 1.5A max
the original adapter has no idea what values, on the Internet only docking stations.
and at the station it says: input 5.0V =; 0.7A

Alas, the electricity and physics of elementary school are in trouble, I hope for your help! :)
Thanks in advance.

Answer 1

There are adapters for 18W and 33W

the only power standard that is supported by 100% of all is 0.5Amp * 5V = 2.5W behind the
scenes, there is support for up to 2.5A * 5V = 12.5W (the fact is that devices usually limit the current through themselves, so it doesn’t matter what current the charger gives them or power bank, if only there was a minimum, instead of 0.5A, manufacturers began to give up to 2.5A currents in the usual usb2, but the voltage in this mode remains 5v)
So all powers above 13W are already different standards, in which the voltages are completely different, of which well, it's just a huge number and most are mutually incompatible, yes, charger manufacturers are trying to support the main ones, but it's better to watch supported ones
For example, I have a charger on which the old xiaomi smartphone charges faster than the new one, the same from xiaomi, and vice versa, there is another charger from the new one, on which the old smartphone charges more slowly and the new one quickly, and all because the standards have changed and in the absence of support the device takes from charging energy only in the minimum supported standard.
ps on the subject of the question itself, you can charge, but it will take a long time