The good power supply is a good thing, I used old Samsung USB chargers, I imagine they deliver an ok quality, but perhaps not as much as a phone has a big batte

The good power supply is a good thing, I used old Samsung USB chargers, I imagine they deliver an ok quality, but perhaps not as much as a phone has a big battery that can work as "big capacitor"/filter of sorts. The UPS is a good idea too, I probably need one here and power going out where I live is something that does happen occasionally.