Smraza 5.1V 3A Power Supply Compatible with Raspberry Pi 4 ON/Off Switch, USB-C Pi 4 Charger Raspi 4B Adapter for Raspberry Pi 4 Model B 1GB 2GB 4GB 8GB Version

Using this with an Orange Pi Zero 3. It's working well. The power switch is a nice feature since the Orange Pi does not have one on the board itself. 5.1V is nice to give a little guard against brownouts that seem to plague these types of devices.

I suppose this works great on a Raspberry Pi 4 or earlier, but on the Pi 5 you get an error on boot that the power supply isn't 5-amps and some features will be limited. Assuming you don't need all the features or ports then it seems to work fine on this power supply. I got it to power a Companion Pi and it worked fine for that. I have since gotten a 5-amp one for the Companion Pi and now use this one for my Satellite Pi. My second Satellite Pi is powered by an even lower 1-amp power supply that came with it, and it too works fine for that role.

Worked great

This power supply is one of the few to deliver the promised 5.1 V at all loads. Although this isn't strictly *necessary* for your pi it is a great way to ensure you pi has plenty of power (especially if powering any USB devices etc.) up to the limit of the pi's input. My supply maintained 5.1 to 5.2 V at all loads for 0.1A to ~3.3A (and was still above 5V when the safety cut-off triggered at 3.6A). By far the best Raspberry Pi power supply I tested. My one complaint is that the push-button style switch means it's not visible whether the the switch is on or off before plugging the device in. I prefer the toggle switches so I can know if it is on or off without powering the pi.

This Smraza power supply is a great choice for your Raspberry Pi 4. The included on/off switch is super handy for easy power control. It's delivered consistent power to my Pi without any issues. Plus, the build quality feels solid. Definitely recommend!

Inline switch is so much better than manual unplugged.

No more lag. It's perfect for it. Liked the on off switch too and the extra adapter

I needed a Raspberry Pi 4-compatible charging adapter (5.1V 3A specifically) to charge my GRS Build-A-Cade. None of my USB-C chargers or high-output battery banks (ones I use for my Switch and Steam Deck) worked at all (no power light by the power port when plugged in). Thankfully, the BAC manual mentioned AC adapters of this specific type, so I placed my order immediately. I was so relieved to see the charging light on the back of my BAG immediately light up red (low battery/charging indicator)! I'm waiting for the unit to fully charge, but I can already tell it's going to work out well in the long run. The built-in power on/off switch on the cable is great to have for hard RPi shutdowns (instead of shutting down then unplugging the cable out every time). Figured I'd mention the specific use case in my review headline in the chance it helps others who are in my same situation. This is the one to get, y'all!