Anyway with my Galaxy A13 - USB-C and 5000mAH battery - it works perfectly and the charge is fast. The A53 may be more powerful and newer, but it should do the job nicely, in my opinion.

The Samsung fast charger TA800N (EP-TA800NBEGEU) is compatible with the charging cable of the Samsung Galaxy Watch5 Pro BT, provided that the charging cable uses the USB-C port. The charger supports USB-PD 3.0 and has a USB-C connector that is compatible with most USB-C cables.

approx. 1h from 1% to 100%.

Vietnam

The power supply for your unit is 8 watts, the plug has 25 watts. I do not know your input power. It will work in any case, as your device only allows its charge and not the 25 watts of the plug. Definitely type USB C, so compatible with your device. In any case, buy a 1.5 metre or 2 metre cable.

No, it says "(without cable)" in brackets.