The BrainMaster 2.0 and 2.5 amplifiers do not have any visual indicator to let you know when your battery is charging properly. Care must be taken to ensure proper charging. Please note that the BrainMaster must be turned OFF for the battery to charge. The battery does not charge while the BrainMaster is turned on. This is a protection measure to keep the client electrically isolated while running a session.
How to know if my battery is dead:
The good news is that usually when the battery dies it can be recovered simply by letting it receive a prolonged charge overnight.
To restore battery:
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