Spicy Pillows

I’ve done a number of these

Discharge the battery as much as possible

Syringe with acetone, have 2-3 ready especially if you have small syringes

Open the macbook, take the bottom off, and place it upside down so it’s it’s in a upside down V shape

Dump a bunch of acetone behind the battery with the syringe so that it pours down toward the bottom, away from keyboard. Let it sit for a minute. Apply gentle heat. Apply more acetone, let it sit.

Start to try to pry it with a spudger (gently) while squirting in acetone around where you pry. If it doesn’t budge repeat the above again. Pry and squirt, pry and squirt. Slow and steady. Keep in mind each cell pack can kind of flex around so when you get past one you kind of start over.

I used both the plastic spudgers and the thin metal kind and always preferred the latter. Plastic works and is safer but the metal kind just work better

Having a contingency plan for if it fails but I never did tbf

Edit: alternatively I remember reading about pulling a thin sharp metal string behind the battery to cut the adhesive. Like a high note piano wire. Never tried it but heard it works. You tuck it behind the battery and slowly drag it down, pulling it left to right so it cuts the adhesive. Seemed sketch to me so I never tried, like it would potentially cut into the battery?