I have an amcrest one and it works great with frigate over RTSP. I also blocked it's internet access and firewalled it on my local network so it can't phone home.
You'd probably want something closer to a USB C power meter. A killawatt would measure the overhead from the charger brick rectifying AC to DC. If you happen to have a killawatt on hand it would work fine most likely.
Some of the best android phones, especially for the price. They seem to last forever and have good non-bloated software + unique features like shake for flashlight (why don't other OEMS have this?). Only complaints I have are some lack of custom ROM support and sometimes wear over time. But for the price they are almost unbeatable.
Percussion in my experience are the ones that mess up the most and make everyone have to restart.