Battery won't charge.

[wibble]

There's a whole load of 'it depends' around charging - which standards the charger or port supports, whether your board has the CC fix, OS support etc. The connector doesn't always tell the whole story as some C ports support one standard and some the other. See https://xnux.eu/devices/feature/anx7688.html for details - in summary a charger supporting the Battery Charging standard should be reliable, while a new Power Delivery one may fall back to 500mA if you don't manually set a current limit - and that's assuming you've got a board with the CC fix (1.2a or you've one some soldering)