Argon Micro USB Cable Power Supply 5.25 Volts 3 Amps for Raspberry Pi 3 and Zero Boards | UL Listed | 3.3 Feet Long Cable with Micro USB Connector | Micro USB Cable and Wall Charger

This thing is the best power supply for the Pi 4, hands down.

Getting the correct amount of power for the board. Buy this one.

Works perfectly

I tried several power adapters and got a lot of low voltage warnings. Granted, they were chargers and not proper power supplies. No low voltage warnings since using this. Seems to be well made and the price is good. This provides plenty of power to my Pi and fixed my problems!

Works as advertised. Too early to have an opinion about its longevity.

Running Call Attendant on an Rpi3b with a US Robotics modem to screen telemarketers, robocalls, etc. on a landline. Works perfect. Hasnt crashed, or needed to be rebooted in months.

Fixed my Octoprint server that started hating all power supplies and all power cables after a couple of years.

Very solid power supply with 5.35V output. The lightning bolt on my (heavily loaded with tons of connected hardware) Raspberry PI 3B+ is history!

No more under charging for better performance.

I tried a few less expensive power supplies that claimed to be 3A but they were still producing undervolts on my Pi running Retropie. This one doesnt, so its highly recommended. Worth spending a few extra bucks for the quality.