From: theom+news@chiark.greenend.org.uk   
      
   Brian Gregory  wrote:   
   > On 23/05/2024 12:28, Chris Townley wrote:   
   > > 5 Volts at 5 amps is within the USB power spec, albeit less commonly used.   
   >   
   > It would be unusual to come across a USB-PD power supply that did 5V 5A.   
   >   
   > 5A is a relatively recent addition to the USB-PD spec. Previously it   
   > stopped at 3A. My 45W Samsung USB-PD charger gets 45W by doing 15V 3A.   
   > My USB-PD laptop charger gets 60W by doing 20V 3A.   
      
   I have a 130W Dell USB-C PSU.  It does USB-PD but strangely: it only   
   supports 5V and 20V, both at 6.5A.  So you can charge things that aren't   
   Dell laptops, but slowly.  Normally phones etc would switch up to 9, 12 or   
   15V to pull more power, but this doesn't have those rails.  They continue   
   to charge from 5V at whatever max current they're happy to take (2A, 3A?) -   
   like a dumb USB-A wall charger.   
      
   I haven't tried it on a Pi5, but I expect it would work just fine.   
      
   Theo   
      
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