I am not doubting your claim, but it makes me wary since all the "cheap" wallwarts that claimed "2.5A" and now "3A" ran about $10, whereas the official RPI wall

I am not doubting your claim, but it makes me wary since all the "cheap" wallwarts that claimed "2.5A" and now "3A" ran about $10, whereas the official RPI wallwart is double that (maybe $18), and a really awesome 5V PSU that can run two rpi at full TDP costs between $35-$120. I have a bunch of "QC3.0/3A Buck converters" for 6-36VDC to USB-A, maybe i should try to run a pi on a SLA Gel 12V battery.