any idea when chargers and additional straps will be available for MARQ2? Also do you know if MARQ supports some quick charging technology like PD or PPS - what kind of charger would give the fastest charging?
I'm just using my Samsung Galaxy S21 Ultra super fast charger
How many amps does the device supply ? Even if the charging electronics in the clock regulates the charging current, I would be careful with this completely oversized charger. Keep in mind that your phone has a battery with a multiple of the capacity than the battery of the watch. I think that the battery of the watch should have about 500mAh. It should not be more than 2C (1Amp).
Garmin's own instructions do not specify the power source.
Also these state that wall charger is ok.
Power isn't 'pushed' to the watch by the charger, the watch 'pulls' just what it needs. The rating of the charger* is just the maximum power it can output in response to that demand, not what it will actually be outputting all the time.
It's the same reason you can plug all the electrical appliances at home into the same sockets, you don't need to have different rated sockets for different appliances based on their power requirements. If your laptop needs 50W, it will draw 50W. If your kettle needs 3kW, it will draw 3kW. The fact that the socket it capable of providing 3kW isn't going to damage your laptop.
*Technically, it's just an adapter - the actual charging takes place inside the watch.