The objective is to remove the battery with the least amount of stress possible. Although it may not be likely on its own, bending lithium-polymer batteries will break their internal seals, and CAN EVEN CAUSE THEM TO EXPLODE!

I will not be held liable for anyone's attempt on completing this step, or any others for that matter. It is AT YOUR OWN RISK

With that in mind, on medium heat and constantly moving around the entire pad of the battery, heat the area for roughly a minute, or until it is hot to the touch