NorthPada Raspberry Pi 4 Model B Pi 400 Power Supply Charger AC Adapter Cord 5V 3A PSU USB C 5 Feet with Power On/Off Switch with a Micro USB Adapter for Raspberry Pi 3 Model B B+ A+ Plus

Seems to be a good p/s although I must admit I am going on quality of construction and intuition as I haven't tested the output. Two things that encouraged me to buy this particular one is there is an indicator light on the switch and the cable exits the top of the plug. I wish more would be constructed like this as in most of the sockets where I plug in electronic devices this style tends not to interfere with anything nearby. Should anything untoward happen I will report back here so if I don't edit this review you can take it that I have been happy with it.Edit: I have now been using this p/s daily for the past couple of weeks and I can confirm that imo it is excellent. I connected it with a USB power meter between it and my RPi 4 (has cooling fan). I then logged the voltage supplied every second over 5 hours and it never went outside a range of 5.13v - 5.14v. I am not an expert but it seems very stable to me. The current drawn varied a bit more but that must have been because of the variable speed fan as I was not using it during the test.I also love the indicator light and I think that should be on all power supplies. The switch and light assembly is near the end of the cable where it plugs into the RPi. I confess that I don't know where other models have it but hopefully they all have it here as it is such an obvious place to mount it.Another update: it is now two months in and all is good and I just want to reiterate my comment about the switch and indicator light at the appliance end of this cable. It is really useful and it would be great if this was a feature that was available on simple USB cables as I sometimes leave some devices connected to a power adaptor which is not good unless they were specifically designed to be connected to power and will switch themselves into trickle mode. Even then it is sometimes good to be easily in control as generally speaking, lithium batteries like to live in a window of 40-80% of charge and all too often, batteries are not replaceable - I ruined my last tablet like this.

Got this for my Pi 4. Work great and I live having the in-line switch so your now always unplugging from the Pi port..Over all was good value and I like..Note the cable length, works for me as I have a plug on my desk but if you need a bit of lenght to reach a socket, this may be a bit short

Just what I needed for a Pi 3B.

Bought a raspberry pi 3 b and needed something to give it enough power without cutting out. Or showing low power icon on pi os. Works perfect not added any other components to the pi as yet to see how much this can take but it’s only going to be an emulation project.

I use this product to drive a small cooler. The little dog that it is for appreciates it in the hot weather.

I have been running this with a PI 3B and usually turn off the switch and unplug. Now I must leave it plugged in permanently and I noticed when I click the switch on the power supply lead to OFF it continues to discharge power. This is evidenced by the pi rebooting instead of turning off. I’m then forced to switch it back to ON immediately to avoid the pi going into an endless boot up cycle.

Works how it needs

The media could not be loaded. Tried using this with a Raspi 4 (2Gb) and a fan but the power supply wasn't stable enough to boot into Raspbian desktop. I thought maybe the fan was drawing too much current but even after I disconnected it, the result is the same. Frequent power brownouts marked by a pulsing red LED on both the Pi and the PSU indicating insufficient power (see the video). I've yet to see the Pi boot with this power supply though it works fine with a Nintendo switch power brick. Will be returning for a refund.