New 3.6V 1000mAh Ni-MH Battery 3HR-AAAU 70AAAH3BMXZ for Bang & Olufsen BeoCom 1, BeoCom 6000, BeoCom M6000, BeoCom M6000 MKII _ - AliExpress Mobile
Amazon.com: Synergy Digital Cordless Phone Battery, Works with Bang & Olufsen BeoCom M6000 MKII Cordless Phone, (Ni-MH, 3.6V, 700 mAh) Ultra High Capacity, Compatible with Bang & Olufsen 3HR-AAAU Battery : Electronics
Amazon.com: HQRP Phone Battery Compatible with Bang & OLUFSEN BeoCom 3HR- AAAU 70AAAH3BMXZ T373 Replacement 2.4GHz Cordless Telephone : Electronics