The issue might be not in the power supply itself, but in a poor usb cable.
You can check actual voltage on the board by running this command:
cat /sys/kernel/rcio/adc/ch0
If it is under 4.8V you have power supply issues.
The issue might be not in the power supply itself, but in a poor usb cable.
You can check actual voltage on the board by running this command:
cat /sys/kernel/rcio/adc/ch0
If it is under 4.8V you have power supply issues.