Step 1 Battery

• The battery is located in the right cup of your headphones. First you need to remove the ear cushion. Insert a spudger between the cushion and the cup and move it around the cup to remove the cushion.
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Step 2

• Remove the four screws to take off the membrane from the cup.
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Step 3
• Carefully remove the membrane part from the cup. Take care not to damage any cables.
• The battery is glued to the board at two long sides. With a cotton swab drenched in isopropyl alcohol you can loosen the glue so the battery can be removed more easily.
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Step 4
• The battery is glued to two strips of sponge rubber who serve as spacers. Insert the spudger between the battery and the rubber to remove the battery.
• Use the drenched cotton swab again if the battery sticks in place and cannot be removed easily.
• After removing the battery clean the sponge rubber from any residual glue.
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Step 5
• With a soldering iron remove the cables of the battery from the board. Take extra care to prevent the cables from touching!
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Step 6
• Prepare the new battery. You might have to shorten the cables a bit first. Take care here as well that the cable ends don't touch.
• Solder the cables of the new battery one after the other. Start with the wihte/yellow and then the red cable. Then cover the already soldered cables insulating tape to prevent accidental touching when soldering the black cable.
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Step 7
• Prepare two strips of double-sided tape (carpet tape) and apply them to the sponge rubber strips. Remove the protective film and place the battery. Press down lightly.
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Step 8
• Place the membrane with the electronics back in the cup. Before putting the screws back in place do a quick test if the headphones work (turn them on).
• Put in the screws, tighten them and reattach the ear cushion.
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