The AirVisual Pro has an internal Lithium-Ion battery with 1900 mAH capacity. It can run for ~4 hours on a single charge. The charger is 5V, 1amp minimum. Meanwhile, there is an over current protection for 3A.

See the link below for how to get the most from your Pro's battery: How can I get the most from my AirVisual Pro's battery?| IQAir

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