The external Bluetooth Speaker for the Tobii M-Series is powered by an own built-in battery which needs to be charged daily. The Tobii M-Series falls back on the internal speaker of your M-Series Tablet PC when the external speaker is out of reach or turned off. The internal speaker still has a good sound quality but the maximum sound output can be too low for school environments, outdoors or when talking in a group of people. Please make sure to charge your external speaker in time. TobiiDynavox recommends to charge your M-Series tablet and speakers when not in use, preferably overnight.
Symptoms of a dead battery with too low capacity: