I have a 2 gallon compressor at home that will pump up any tire I've tried it on. My son got me a fathers day gift last year of one of those small battery powered types, the size of a walkie talkie. Air moto is the brand. It's the next best thing to useless. It will go completely dead and shut itself off, while just topping off your tires a couple of pounds each. I don't think it would fill a tire if it was completely flat, before it died. And yes it was completely charged. It might be good for a bicycle tire or an air mattress, or maybe a basketball. It was a gift, so I can't say anything to him about it.,,