How long does the battery last? Jenny Flor Jiang July 12, 2018 09:51 Updated Follow The battery lasts for approximately one month with a single charge if you brush your teeth twice a day. Related articles How long does it take to fully charge the empty battery? Can I leave the Amabrush constantly sitting on the charging station? How do I charge the Amabrush? Tell me more about the UV-station Can I use my own toothpaste? Comments 0 comments Please sign in to leave a comment.