STARNOVO 3.7V 800mAh Replacement Battery for Sennheiser HD 4.40, HD 4.50, Urbanite XL, Momentum 2.0 Wireless Bluetooth Headphones, AHB622540N01
New 3.7v 600mah Battery For Sennheiser Momentum 3 Wireless / M3 Wireless / Momentum True Wireless 2 Accumulator Batterie 3-wire - Mobile Phone Batteries - AliExpress
New Battery For Sennheiser Momentum In-ear Headset Li-po Rechargeable Accumulator Replacement 3.7v 170mah Ahb471233pst W/3 Lines - Digital Batteries - AliExpress
New 170mah Ahb471233pst Replacement Battery For Sennheiser Momentum In-ear Headset Accumulator Batterie 3-wire +tools - Mobile Phone Batteries - AliExpress
Amazon.com: AOLIKES 350mAh Replacement Battery for Sennheiser Flex 5000,RS 5000 RS2000 Digital Wireless Headphone for TV : Electronics
MPF Products 600mAh AHB622540N01 Battery Replacement Compatible with Sennheiser HD 4.40, HD 4.50, Urbanite XL, Momentum 2.0 Wireless Bluetooth Headphones