This frother works great until you need to charge. I suspect it was designed to fit a standard USB, but it doesn't. The included charging cable (seemingly a non-standard size) is a little loose, so you're always fiddling with it to charge. And even when the light flashes green, it doesn't seem to have fully charged. I charged it overnight and it died again after the second use. This is the second time I've purchased because the concept is great, and the initial charge lasted me a couple months (using it 2-3x a month). However, I wouldn't repurchase and don't recommend.The search for a great portable frother continues!