Amazon.com: Replacement Battery for SENNHEISER D10, DW Office, DW Office ML, DW Pro 1, DW Pro 2, DW Pro 30, DW Pro1, DW Pro2, DW Pro2 ML, DW SD Pro1, DW-Reihe, MB
Battery for Sennheiser D10 DW Office DW Pro 1&2&30 DW SD Pro1 DW Reihe MB Pro 1&2 Li Po Rechargeable 504374 BATT 03 3.7V 200mAh|Digital Batteries| - AliExpress