Monster Clarityhd Bluetooth Wireless Foldable On Ear Headphones

Monster Clarityhd Bluetooth Wireless Foldable On Ear Headphones
My headphones die after 30 minuets of use. This was never the case before. I feel like the battery is dying or damaged. Is there any way to replace the battery and salvage my headphones? There’s no damage whatsoever so I’m confused as to why this started happening.

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