Charger for Capsule (Original)

I’ve been getting a message recently that I have to use a “QC 3.0” compatible charger, this didn’t use to happen before. Now the capsule does not charge while it’s on. I’ve tried a few different 5V chargers, and also bought a special QC 3.0 40W charger. When I use the QC 3.0 charger I don’t get the message, but the capsule slowly loses charge when I use it.

Can anyone provide what charger / cable I should use to charge the original Capsule?