This is a rechargeable B&O 3.7V 4.2V 560mAh AEC643333A Battery . High quality and long lifetime, this AEC643333A battery lets you work seamlessly when you are on the move for business trips or vacations. All our Li-ion replacement batteries for B&O AEC643333A Headphone have been tested and proven to match and/or exceed original battery performance and are […]