Be very careful not to puncture or crease the battery during this step, as it can leak chemicals or catch fire.

Use a spudger to slowly pry up the top edge of the battery until its adhesive separates.

Remove the battery.

During reassembly:

When installing a new battery, make sure the end with cables is near the bottom of the ear cup so the connector can reach its socket.

If your replacement battery comes with adhesive pre-installed, remove the plastic liner and press the battery into place.

If your replacement battery doesn't come with adhesive pre-installed, use strips of double-sided tape to secure it in the recess.