I was trying to consolidate my chargers into a single charging station and I didn't realize started a saga. Eventually I had to give up. While I was getting down the rabbit hole, I tested dozens of different chargers and the results were quite unexpected. Though I didn't use an oscilloscope, the usb power meters used gave almost the same results, thus I would say the results were good. The best of those were a few ~$7 ones bought from Amazon, good/fair ones were either came with mobile devices or from popular brands such as A*r or B**n(I hid the names here deliberately to avoid being taken as ads). The worst were also among the two aforementioned popular brands. For A brand, its voltage dropped to 4.8V when under load ~1.8A but it caused significant interference that the USB light's switch stopped working after powered on. B brand were even worse, voltage dropped to 4.5V when under ~1.7A load.
So literally I gave up and continue to use what I have right now, at least for now.
I was trying to consolidate my chargers into a single charging station and I didn't realize started a saga. Eventually I had to give up. While I was getting down the rabbit hole, I tested dozens of different chargers and the results were quite unexpected. Though I didn't use an oscilloscope, the usb power meters used gave almost the same results, thus I would say the results were good. The best of those were a few ~$7 ones bought from Amazon, good/fair ones were either came with mobile devices or from popular brands such as A*r or B**n(I hid the names here deliberately to avoid being taken as ads). The worst were also among the two aforementioned popular brands. For A brand, its voltage dropped to 4.8V when under load ~1.8A but it caused significant interference that the USB light's switch stopped working after powered on. B brand were even worse, voltage dropped to 4.5V when under ~1.7A load.
So literally I gave up and continue to use what I have right now, at least for now.