Charging during performance
Artists are creative people, and it often happens that only before the show they notice that their props are not ready for work. If your lamp is discharged, there will be 2 options.
1) Arrive at the performance venue and allow it to charge 20-30 minutes from the 220V outlet. And then take it to the stage and let it run from the built-in battery. In this case, it is guaranteed to work its half hour while you're blowing bubbles.
2) Option 2 – take the extension cable to the stage and connect the lamp to 220V. In this case, it can work and be charged at the same time.