Should I remove the JBL PartyBox 320 battery and plug it into a power outlet for every use?

locha

I just bought a JBL PartyBox 320 for home karaoke use, and overall, I’m happy with it.
I don’t plan to use the PartyBox outdoors—just indoors. For this purpose, I’m wondering if I should remove its battery and plug it directly into the power outlet for each karaoke session. If I leave the battery inserted while keeping it plugged into the power outlet all the time, will that harm the battery? Thank you!