Amen! And we chose to loosen it before undoing EVERY screw from the camera strip region, in the hopes of being able to avoid taking apart more stuff. With 2 people, we could slide out a ‘puffy’ battery after removing what I think was most, but not all, screws.
We loosened it with heat (a hair dryer from the back side) and a credit card (which we broke - use an old one!).
Thanks to all who contributed here! The COMMENTS (at end & after each step) are CRITICAL. So glad I read them FIRST (along with watching a couple of YouTube videos).
I was replacing a swollen battery and was able to complete this repair in about 2 hours with the help of my teenager. It definitely helped to have a second set of hands and some young eyes and nimble fingers. There are lots of tiny screws. I found that they were all T3 - which is unfortunately NOT a driver size that comes in the basic iFixIt toolkit I also bought with my new battery :(
This definitely requires a lot of patience and some sort of credit card (you’re willing to break) to detach the old battery. It has a ridiculous amount of tape holding it down. Loosening it with heat and prying is not fun when there’s a risk of puncturing the puffy metal bag and risking fire.
I feel like the biggest unmentioned challenge is in the motherboard’s cables coming lose on both sides, without you even noticing it. They don’t have a very secure connection.