Product overheated in less than 15 minutes of use and refused to work until I paused a few hours and it worked again). At the same time, a fully charged device was discharged to a bar on the battery indicator. I probably pumped about 10psi in that 15 minutes of use. Also the cable is very short and you have to hold the device when the valve is facing the top of the tire. I also had trouble getting the valve attached properly - too tight, air will leak out of the tire, but too loose, the device won't even recognize it's plugged in. Waste of time so I'm sending it back.