this post was submitted on 01 Apr 2026
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The 5V5A supply is optional, the Pi 5 alone works perfectly fine using a standard 5V3A USB-PD supply, it just limits the maximum combined USB port current to 600mA.
But technically they are still in USB-PD spec: it's apparently okay for a charger to support 5V5A, and a device to "prefer" to use that if it's available. It can't be required, but as said, the Pi 5 works with 5V3A, so it isn't.
It's still dumb, and they should have just used 9V3A instead and paid the dollar for the stepdown circuitry like everyone else.