![Amazon.com: AOLIKES 700mAh Rechargeable Replacement Battery for Sennheiser HD 4.40 HD 4.50 BTNC Wireless Headphones and for Steelseries Aerox 9 Aerox 5 Wireless Battery Replacement : Electronics Amazon.com: AOLIKES 700mAh Rechargeable Replacement Battery for Sennheiser HD 4.40 HD 4.50 BTNC Wireless Headphones and for Steelseries Aerox 9 Aerox 5 Wireless Battery Replacement : Electronics](https://m.media-amazon.com/images/I/51+intHUEZL.jpg)
Amazon.com: AOLIKES 700mAh Rechargeable Replacement Battery for Sennheiser HD 4.40 HD 4.50 BTNC Wireless Headphones and for Steelseries Aerox 9 Aerox 5 Wireless Battery Replacement : Electronics
![Amazon.com: SENNHEISER HD 450BT Bluetooth 5.0 Wireless Headphone with Active Noise Cancellation - 30-Hour Battery Life, USB-C Fast Charging, Virtual Assistant Button, Foldable - Black : Electronics Amazon.com: SENNHEISER HD 450BT Bluetooth 5.0 Wireless Headphone with Active Noise Cancellation - 30-Hour Battery Life, USB-C Fast Charging, Virtual Assistant Button, Foldable - Black : Electronics](https://m.media-amazon.com/images/I/71z97HfSZxS._AC_UF894,1000_QL80_.jpg)
Amazon.com: SENNHEISER HD 450BT Bluetooth 5.0 Wireless Headphone with Active Noise Cancellation - 30-Hour Battery Life, USB-C Fast Charging, Virtual Assistant Button, Foldable - Black : Electronics
![Amazon.com: AOLIKES 700mAh Rechargeable Replacement Battery for Sennheiser HD 4.40 HD 4.50 BTNC Wireless Headphones and for Steelseries Aerox 9 Aerox 5 Wireless Battery Replacement : Electronics Amazon.com: AOLIKES 700mAh Rechargeable Replacement Battery for Sennheiser HD 4.40 HD 4.50 BTNC Wireless Headphones and for Steelseries Aerox 9 Aerox 5 Wireless Battery Replacement : Electronics](https://m.media-amazon.com/images/I/51j00RaatqS._AC_UF894,1000_QL80_.jpg)
Amazon.com: AOLIKES 700mAh Rechargeable Replacement Battery for Sennheiser HD 4.40 HD 4.50 BTNC Wireless Headphones and for Steelseries Aerox 9 Aerox 5 Wireless Battery Replacement : Electronics
![Eartlogis Replacement Ear Pads For Sennheiser Hd 300/ 400s/ 4.20/ 4.30/ 4.40/ 4.50 Bt Btnc/ 4.40bt/ 4.50bt Earmuff Cover Cushion - Earphone Accessories - AliExpress Eartlogis Replacement Ear Pads For Sennheiser Hd 300/ 400s/ 4.20/ 4.30/ 4.40/ 4.50 Bt Btnc/ 4.40bt/ 4.50bt Earmuff Cover Cushion - Earphone Accessories - AliExpress](https://ae01.alicdn.com/kf/H800897347c0a42f58f246ae57c03143fF/EarTlogis-Replacement-Ear-Pads-for-Sennheiser-HD-300-400S-4-20-4-30-4-40-4.jpg)