Just reset the megaboom: While it’s on press the on/off button and the volume down button simultaneously until the megaboom makes a sound and turns off. Then restart it. That’s it. It is now back to factory settings, will make the usual extemely loud drumroll, the LED on top will light up white again instead of red and the megaboom recognises 40% charge and happily will start charging on. You will have to re-connect with the megaboom since it’s forgotten all it’s old pals ;-) The Megaboom(s) display this behaviour when they are put away with a pretty full battery and neglected for a period (10 days will do it I think). My theory is, it can’t handle being ignored and pouts until it’s brain breaks and it needsd a reset. Or maybe it’s just lousy programming by Logitech, who can say….