Repeat the above steps to separate the adjacent battery cell from its adhesive:

Apply a small amount (about 1 ml) of liquid adhesive remover under the battery cell.

Wait 2-3 minutes for the adhesive remover to penetrate and soften the adhesive.

Carefully wedge a spudger or plastic card inwards, being careful to not damage the battery, and separate the battery cell from the adhesive securing it to your MacBook Pro.