Will not keep charge for more than 5 mins

How to find and replace batteries on the Sennheiser Momentum 2.0

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It would be really nice if you guys would do some kind of tear down for these headphones.... I have a loose charging jack and it would be great if I could disassemble these without destroying them, considering how expensive these things are. You guys can do iPhones and Galaxies but these are $400-500 headphones so, I think that these would worthy of a teardown too. Thanks.

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