What battery are you using? Jenny Flor Jiang March 02, 2018 11:47 Follow In our handpiece, a lithium-ion battery is installed. Related articles What are the Bluetooth features? (When) Can I buy the Amabrush at retail-stores? How do I charge the Amabrush? Do you have different sizes? How long does the battery last? Comments 0 comments Please sign in to leave a comment.