I have a Woburn II speaker and I've paired it to my HP Envy Laptop but I keep seeing a LOW BATTERY message. I see that the device is paired but cannot play via bluetooth because of LOW BATTERY. The speaker doesn't have a battery.
Please contact firstname.lastname@example.org , they will be able to advise.
I am having the same problem with a Surface Laptop. I'm successfully paired but settings in windows shows 0% battery so I cannot play through the speaker.