Yeah, I can’t imagine that thing would manage heat build-up very well. Looks so contained without any kind of vent.
Back in the summer of last year, Jon Slider and I were fixated on finding really good portable air pumps that could handle car tires well. After a few tries & fails, we found one that worked out well. LINK. I still use it periodically and have no trouble at all. The hose+nozzle doesn’t stow that well, so I leave part of it hanging out. The battery keeps a charge for a long while. I think I’ve charged it up fully about 3 times so far. I checked around and it looks like this model was discontinued. It’s a design that really works. I see dozens of crazy designs coming out from all of these weird Chinese named companies like Ghiluli, Shaman, AirPou, Haolite, Viyor, etc. Then in about a year, they’re gone.