I’ve been using one of these EcoFlow batteries for a while now. It gives me the option to use an electric balloon inflator in the back of the van (or take the car). For previous 30 years I’ve been hiring air cylinders which are now no longer needed.
I use the Delta Mini, which can inflate 1500 balloons which is equivalent to having 12 Nitrogen/Air cylinders. It works best with the small pink inflators as they only pull 650W.
EcoFlow