Battery life and charging
You can easily check the 3G printer's battery level when the 3G is inserted.
Use the arrows on the 3G card reader to open the menu and select "Device settings".
Choose "Printer" to view your printer's battery level.
If using a third-party adapter to charge your device, be sure it's of reputable quality, supports USB-C to USB-C charging and fulfils 5V/3A, 9V/2A, 12V/1.5A voltage and amperage criteria.
When plugged into a power supply the printer will charge both itself and any attached 3G Card Reader. A red LED beside the printer’s charging port will light up while charging. When fully charged the light will turn green.