5 Month Life Expectancy at Best [SEP] Bought two, one in June, the other in October of 2021. The one purchased in June died right before the October purchase (return window closed), so I bought another thinking it was a fluke… it wasn’t. Seems they last about 5 months, and that’s it. I’m sure it’ll last even less for someone that isn’t using it just once or twice a week for hobby paint (about the same size as a nail polish bottle). The battery option is also useless, even when they’re new, the batteries barely shake it at all. You’re better off just holding the paint with your teeth and sitting on a vibrator.