Megaboom will play off the battery as long as I hold my thumb pressing the power button. When I let it go, unit shuts down. Indicating a healthy battery.

Otherwise will not stay turned on. Plays fine when plugged into the charger.

+- buttons inform me of 100 % charge.

Is there a factory reset I can do while plugged into the charger?

Can I “flash" the battery?

Megaboom will play off the battery as long as I hold my thumb pressing the power button. When I let it go, unit shuts down.

Otherwise will not stay turned on. Plays fine when plugged into the charger.

+- buttons tell me 100 % charged just before shutting off. I s there method of initiating a factory reset whilst on the charger supply?