Use scissors to cut one of your opening picks to about the width of the battery. Try not to leave any sharp corners.

Insert the modified pick between the edge of the battery and the case, on the side opposite the digital crown.

Use constant, steady pressure to slowly pry the battery up, separating it from the adhesive securing it to the system board.

If needed, you can also safely pry along the top edge of the battery, against the Taptic Engine.

Mind the display cables so you don't damage them when levering the battery out.

Make sure you don't puncture or deform the battery, as it can catch fire and/or explode if damaged.