When using the recommended portable charger the low voltage warning sometimes pops up covering part of the GUI and throttles the Pi performance as a safety precaution. This may cause longer loading times if you are using the pointing calculator or the Jupyter notebook in the field.
The Pi 400 recommends a 15W power supply for the board and USB peripherals. The recommended screen advertises a power draw of 2.5W. meanwhile the currently recommended portable charger supplies only 12W max. There are similar priced portable chargers on amazon that can supply 15W and slightly more expensive at 22.5W. It might be worth looking into these to see if the warning message will go away.
When using the recommended portable charger the low voltage warning sometimes pops up covering part of the GUI and throttles the Pi performance as a safety precaution. This may cause longer loading times if you are using the pointing calculator or the Jupyter notebook in the field.
The Pi 400 recommends a 15W power supply for the board and USB peripherals. The recommended screen advertises a power draw of 2.5W. meanwhile the currently recommended portable charger supplies only 12W max. There are similar priced portable chargers on amazon that can supply 15W and slightly more expensive at 22.5W. It might be worth looking into these to see if the warning message will go away.