From: news@cct-net.co.uk   
      
   On 09/10/2025 19:01, Joerg Walther wrote:   
   > Mike Scott wrote:   
   >   
   >>> The psu is not one expressly declared for use with the Pi5, or is it?   
   >>> Afaik the Pi5 needs 5A plus the USB Power Delivery feature, which the   
   >>> Pi4 psu does not have. The Pi4 psu won't let you run the Pi5 reliably.   
   >>> So you probably need another psu after all, I'd recommend the official   
   >>> one, you can never go wrong with that.   
   >>   
   >> But it is the official one. Or at least, was bought as such and is so   
   >> labelled. A huge wall-wart.   
   >>   
   >> Bought from pi hut back in February; carries authentic-looking labelling.   
   >   
   > There is an official one guaranteed to work with the Pi4 only and a   
   > different official one for the Pi5, and only this one has the PD   
   > feature. Check what exactly you have bought. If this really is the Pi5   
   > version, it is defective and you should consider returning it.   
   >   
   > -jw-   
      
   Are you using something like the Argon ONE V3 case?   
   That needs the config.txt line "usb_max_current_enable=1" as it filters   
   the power through its hardware. Bloody pain!   
      
   --   
   Chris   
      
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