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Power is the rate at which energy is supplied or consumed, often measured in Watts. This tag covers electrical power specifically, the voltage and current specifications for supplying power to the Pi, the specifics of power consumption by the Pi, and methods for controlling Pi power consumption.

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Can Rpi4B power external / portable USB HDD / SSD?

Yes, i'm trying to use hard drive on raspberry pi 3b+ , but it's not working .so i bought raspberry pi 4 it's working on it . when i'm trying use HDD on rpi3 answer from google - maybe you can external power … supply to deliver power to HDD. all over i didn't found any external power supply to deliver power to HDD. then only option left is to use Rpi4. so yeh you can Raspberry pi 4 …
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