Sennheiser Momentum 4 Battery Replacement

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Insert the flat end of a spudger between the lower edge of the battery and the battery housing.
Do not bend, warp, or puncture the battery.
Gently lift the battery upward to release the adhesive that secures the battery.
If necessary, use a hairdryer to lightly heat the battery to loosen the adhesive.
Remove the battery.

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