Anker 737 Slow charging than it should, screen wattage is not correct issues, etc. 

Please note that the power bank input/output depends on the intelligent algorithm that, at a specific time, the power bank provides a certain amount of power to keep itself and another device safe from overheating or other issues. Please do not worry about the output/ input wattage on the screen.

To test this, please check the total recharging time of your device instead of worrying about the screen wattage. If it's working and provides enough power to recharge your laptop in normal time, then it is not defective. If it does not even provide enough power to increase the device’s laptop's battery, then it is defective. Recently, according to our testing, we found that the screen shows less wattage, but the powerbank, in reality, provides enough wattage to charge the device as fast as it should.

If you have any questions, please contact us for further assistance.