The recommended power supply for a Raspberry Pi 3A+ is 5V @ 2.5A. At full stress the board will draw around 1A, and at idle considerably less.
It seems surprising to me that a 3A+ will pull so much current that the voltage of all 'chargers' tried would collapse. I recall I ran my 3A+ from a Poundland 1A phone charger with no problem when USB wasn't being used.
But I am noticing that my Pi 3B (non-plus) running Trixie presents more under-voltage pop-ups than it ever did when running Buster with the same 2.5A PSU. I am not sure if that's a change in the Raspberry Pi OS or an unrelated issue.
It seems surprising to me that a 3A+ will pull so much current that the voltage of all 'chargers' tried would collapse. I recall I ran my 3A+ from a Poundland 1A phone charger with no problem when USB wasn't being used.
But I am noticing that my Pi 3B (non-plus) running Trixie presents more under-voltage pop-ups than it ever did when running Buster with the same 2.5A PSU. I am not sure if that's a change in the Raspberry Pi OS or an unrelated issue.
Statistics: Posted by hippy — Thu Oct 23, 2025 12:56 pm