Changed the battery to the second Pixel 4XL. Obviously, it went faster. Having some highly concentrated isopropyl alcohol (>99% by volume) makes your life a lot easier when clearing the gunk and dislodging the battery.
What I want to mention is: please DO NOT RUSH. Take your time, do it elegantly. For the first time changing a battery, 30 minutes estimated time is a little too optimistic. Scrapping off the old gunk from the phone and the back cover took more than I thought, but it’s a cheap price to pay for a job done well. It was fun!
Just finished changing the battery to my Pixel 4XL. Battery was slightly bloated (about 1mm) but still running great, at 104% after one year and a half. However, it suddenly stopped charging wirelessly, even from the original Pixel charger.
The kit was great, everything happened according to the instructions. Carefully cleaning the old adhesive took most of the time. I used lint-free wipes and a small syringe filled with Isopropyl alcohol 99.9% to drop the liquid over the adhesive strips in small sections, with the phone positioned vertically, so the alcohol didn’t get inside. Same for the rear cover [Regular rubbing alcohol does not work at all for this purpose] The alcohol really helped removing the old stretch release strips really fast. The connector of the new battery was slightly out of alignment, so I had to plug it first, with the battery leaning at a small angle, then seat the battery on the glue strips. Thank you, that was fun! :)