How to fit 90Wh battery in regular LG Gram 17?

The easy answer is return that battery for an 80 wh battery.

I just did this to my LG Gram 17 (2021 model: 17Z90Q-K.AAC7U1). The case is metal, and is difficult to work with, and there is PLENTY of potential problems. I DO NOT RECOMMEND THIS MODIFICATION. However, I did it, and it works. I've modded plenty of laptops and desktops over the years, so this wasn't that difficult for me. I had the parts I needed, NT Cutter Pro razor knife, 3 different metal saws, needle nose plyers, sandpaper block, vacuume cleaner, and patience and skill. It took me around 2 hours to complete. I'll say this one more time, there was so many ways I could have perminately damaged my computer. If it's worth the risk, and you have the skills, patience, and competence, then it's doable.

What I did:

I first used needle nose plyers to gently break off all the tabs and peices that were thin enough to break. Most of these broke pretty well, there is a lot about technique and how the plyers are aligned to break things. Some left some pretty sharp pointing metal, that I later sanded down smooth.

After all the tabs and small peices were broken off, I used a metal saw (sometimes just the saw blade so I could bend it as I cut away the pieces I wanted without hurting anything else. Since this creates lots of metal shavings, I used my Dyson vacuume while sawing (so one hand sawing and bending the blade, second hand holding dyson vacuume end near the cutting to prevent shaving from going into compenents and cracks, this could be very problematic or catastrophic later if you they connect the wrong things if left.

After cutting, I used a sandpaper block to smooth everything down so it's not at risk of puncturing the larger battery. Again, using vacuume while sanding. None of this was easy conditions to work in, which is usually true for small electronic devices.

Here's some pictures I took with descriptions. https://albums.ente.io/?t=X9zW49bG#7NTVz...