> did the instructions say it’s a) dangerous with a power supply that can’t provide 1A or b) not/less functional without the 1a supply? To me, the real red fla

> did the instructions say it’s a) dangerous with a power supply that can’t provide 1A or b) not/less functional without the 1a supply? To me, the real red flag is: what happens when you plug it into an 3 A USB charger? Being a constant voltage supply, the load should only draw as much current as needed, and it should work with no problems (which is the usual expectation of 90% of consumer electronics with a USB port). The warning of "only use 1 A charger" notice is suspicious because it may suggest that the product doesn't include any internal overcurrent protection by itself (like a $0.1 polyfuse), and solely depends on the current limiting of the USB charger for its safety. While it's possible that it's not inherently wrong, but it's certainly a bad design practice.