Chosen Solution
Some manufacturers deliberately program the battery circuit to destroy itself if the battery cells were to be disconnected. They do that to have a monopoly on original batteries and rip consumers off. Has anyone tried to replace the 18650 cells and had success? For me it did not work, and I made no errors in replacing them. My box behaves as if no battery is connected (sometimes noisy sound telling me “critical battery” and such only while plugged into USB). I now wonder if the battery is actually the cause, though it seems so.
So here is the correct battery for the MegaBoom speaker Logitech UE MegaBoom Battery and here’s the guide to put it in Logitech UE MegaBoom Battery Replacement
