“How much current does the PurpleAir monitor pull/use?”

“5V USB Micro, 0.18A continuous, 600mA peak” -from PurpleAir Flex specs listed here

“PurpleAir sensors run on 5 volts and the current draw is 180mA. This means the power consumption of a sensor is about 1 watt. If running the sensor 24 hours per day, the daily consumption would be 0.024 kWh. We have experimented with a 20Ah battery pack and found it was able to keep the sensor running for about four days.” –PurpleAir Forum