Question about Digitec Power Bank

The power bank switches off after about 30 seconds if the power consumption is too low, as it requires a minimum current to continue supplying power. For this power bank with 15000 mAh and 30 W output, the required minimum current is typically around 100 mA to 200 mA so that it does not go into switch-off mode. If the Arduino draws less current, the power bank recognises this as an open circuit and switches off.

To operate the Arduino continuously, the current consumption should be at least in this range or you can add a load (e.g. a resistor or another device) to increase the current requirement and thus prevent the switch-off. The power bank also supports adaptive fast charging technologies, which means that it can respond to different loads, but too low a load will result in shutdown [product data].