Lol, I have never used the standard charger, only USB-C. (the accessories below arrived much earlier than the cube mix plus) Charge time is around 1h50 for an almost full charge. My Setup : a “RAVPower 36W Type-C & USB Dual Port Fast Charger” + “dodocool 7 in 1” hub. I have a USB dac plugged on it + HDMI. So I plug my Cube mix plus with its USB C port and I’ve got a monitor + dual speaker + charge (also an external HD) immediatly. I also connected on the Hub a USB switcher with Keyboard and mouse and printer that I share with my gaming PC. Since I bougth my cube mix plus I don’t use anymore my gaming PC … except when gaming ! I’m really happy with this tablet.
have you tried charging your mix plus with a USB C powerbank already?