If anyone will have a deep battery discharge, the speaker can stopped to be charged at all. It is necessary to connect speaker with a cable to phone, press button turn on for like 10s. Still holding disconnect cable and then release the button. It should then start charging again, a quick crazy fix. I mention this because if port was broken the battery wasn't charged for some time and it is possible that deep battery discharge happened. The manufacturer obviously forgot to mention that such thing can happen. It is also possible to update the system when speaker is connected to PC and then Google "update bose speaker online". You go to bose website, download a program and then it is updated. Either update through PC, 10s trick or both - solved my problem. I couldn't charge my battery at all it was remaining on 5% max while connected to a wall socket, no update through phone was possible.