How to Choose Power Supply for DC micro pumps?

The most important parameters of the switching power supply for micro pumps are the output voltage and output current.
For a micro pump to work properly, the output voltage and the operating voltage need to be the same. For example, both need to be 12V DC. Power supply output current has to be larger than the maximum pump working current. No need to worry that if power supply current exceeds the maximum operating current of the pump, the pump will burn and break down. This is because even if the switching power supply, battery or battery current is large, it only means that the power supply can provide a large current capacity. During the actual work process, it doesn't always need maximum power supply current to provide power. It depends on the size of the load on the pump. Only when the load is large, supply power to the micro pump current needs to be large.