Replacing the battery for Sennheiser HD 4.40 or 4.50, both are almost the same thing except 4.50 has Noise Cancellation.
Skip to 3:39 [ Ссылка ] for ear pad replacement
Products used in this video (affiliate links to help support my channel):
Sennheiser HD 4.50BTNC: [ Ссылка ]
Sennheiser HD 4.40BT: [ Ссылка ]
Replacement Earpads: [ Ссылка ]
Blue Repair Mat: [ Ссылка ]
Repair Tools: [ Ссылка ]
Music from: [ Ссылка ]
