Raspberry Pi Forums

Hello , upgrading from Rpi 3B to 4 - I assume there is power supply compatibility?

Confirmation will be welcomed

Thanks DonMI

If you want to use your existing pi3 power supply you will need an adapter to convert micro USB to USB-C.

https://www.raspberrypi.org/products/us ... c-adapter/

And depending on what peripherals are attached you should be aware that the Pi 4 can draw more current. A 3Amp supply is recommended, though in most cases the 2.5 amps from the Pi 3 supply should be enough.

I ran my Pi 4B on the older official 2.5A supply with an adapter, with no issues. I didn't have a whole lot of extras connected, just monitor, keyboard and mouse. The new supplies were sold out when I ordered my Pi 4B. I have since went to the new supply. My advice is to buy the new matching supply. Then use your current one with your Pi 3 and double your fun.

Thanks to all for this.

I don't like adapters.
The Pi4 PSU is cheap and smaller than the old Pi3 one:

https://thepihut.com/products/raspberry-pi-psu-uk