If someone wonders on how I “know” (before connecting anything to the USB-C port of Librem 5) that chosen power supply will charge my Librem 5, take a look below when recharging some 18650 3000mAh 3.6V based device maximum (1.880A) allowed/accepted load (another 18650 battery might allow higher charging amperage but this would be anyway irrelevant here):
When using device that can indeed take/consume 3.0A at 5.00V:
Very same 5V/3A “end user” (where actually PD 20V recharging preferred) with another 56 kΩ compliant/premium cable used:
Power supply used for this demo is described here: Changes in charging behavior ?!. 12V was connected/used input as my preference here, but 20V input might be used/implemented as well.
EDIT: I’m not using here related powerbank (as having another purpose) with the Librem 5, but anyway (as mentioned above) showing USB-PD port related 5V/3A input (to be clear, as shown above, about here related/presented power supply, from Wondom, max. current output):
Below picture is showing power receiving data from the USB 1A charging port (black one), might be as well the recommended, supported protocol described here, one to be used with …:
