Hello John Michael,
Congratulations on your purchase, this is one of my favorite portable speakers!! You can charge the speaker off a USB port on a computer or look for a USB power supply that is rated for 5 volt 1 amp.
Let us know if you have any other questions.
Joel - Bose Support
Hi John Michael,
Thanks for the question. No, the speaker will not overcharge. You can keep it plugged in, and it will stop charging when the battery is full.
Brandon - Bose Support