To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyses reviews to verify trustworthiness.
I recommend only buying this if you're planning on using it exclusively with your Pi4 and never for anything else. If you want a USB-C power supply for a different reason, you may want to consider a different device which can meet all of your needs.
I bought this to sometimes power a Raspberry Pi and sometimes charge my phone, depending on where my Pi needs to be at that moment. I'm aware that it's not a QuickCharger, but the power supply that came with my ArgonOne case (with a similar amperage rating) will dump loads of current into my phone and charge it in about an hour, while this thing charges at a crawl. It could be a quirk of my phone, I suppose, or it could be a poorly implemented USB-C interface so that my phone is deliberately limiting itself to micro-USB levels of current (phone screen says "slow charging").
I know this power supply is capable of supplying more current because the RPi runs perfectly fine with it, even overclocked. Even so, since it doesn't meet all of my expectations while a different RPi 4 power supply does, I can only give it 4 stars.
It does what it is supposed to do; the PI does not suffer power undervoltage even when overclocked; but there is a large flaw which is that the power supply has no switch; so you plug it in and the PI goes on and stay on until you unplug it.
You can solve the issue by adding a switch between the power supply and the pi; but feels like the switch should be on the cable already
Unfortunately, since it's one of the few certified Rpi4 PSUs, it's expensive. It would also be nice to use the power connector on the Rpi4, instead of the usb C interface, but I guess whatever. It meets the requirements.
There is not much to say other than this power supply is well made and works as intended. I gave 4 stars instead of 5 due to the design causing a loose fit when plugged into a power strip or wall outlet, possibly leading to an accidental loss of power. Granted this has not happened with mine and I have only used one outlet, but I am a little concerned over it.