Have two BOSE S1's, one of them constantly trickle charges. Battery is fully charged but as soon as I turn it on the blue light in the back fades in and out like it's charging. Turn it off or move to turbo charge and it shows fully charged. Switched batteries thinking that may be the problem, but even with the battery from the other S1 it does the same thing. Running the latest version 7.1.8. Tried resetting it, removed the battery and plugged in without the battery and then with the battery and it's still doing the same thing. Concerned that the battery may be over charging or it's not using the main's power. Definitely not normal. I believe this started happening after the latest firmware update. Thoughts?