A:Answer Yes, you can keep the SoundLink Max Portable Speaker plugged into a USB‑C charging block and AC outlet while using it indoors with your turntable. The speaker is designed to operate while charging, and its lithium battery has built‑in protection to prevent overcharging. Even when left plugged in, the battery will only recharge once the level drops below a certain point, so you don’t need to worry about damage. This setup is perfectly fine for extended indoor use and ensures uninterrupted playback.