AmazonBasics B00LRK8JDC Instruction Manual page 5

Power overload protection: Your power
bank has overload protection. To protect
your power bank and your connected
device in an overload situation, charging
stops and the LEDs turn off.
An overload can occur if the device you are
charging needs a higher power input than
your power bank can supply or if your
power bank is outputting more than 5V/3.4A
of power.
5