Help with identifying potential "spicy pillows" (bloated battery packs) on older Nintendo handhelds

Hey folks,
I've recently been on a hunt through all my equipment with internal battery packs to find "spicy pillows" and found 2 in an old smartphone and laptop.

Sooo, I've become slightly paranoid about it and also checked my older Nintendo handhelds with internal battery packs. And on 3 of them, the packs aren't as swollen as some of the examples in Lexis video, but they are slightly thicker in the center, and I have no idea if that's normal or if they are in an early stage of becoming pillows since I have no other reference.

Measured the thickness of the packs on one of their short edges and on the part that feels thicker.
`GBA SP 5.4mm 6.2mm

DSi XL 6.2mm 6.4mm

New 3DS XL 6.6mm* 6.6mm*`
*the 3DS pack is a bit weird, the plastic caps on the short ends are ~6.6mm thick but some of the "soft" parts around the edge of the pack are thinner than the majority of the pack center.

If you have one of these devices available it would be great if you could cross-check the battery pack thickness. I don't wanna dump/replace packs that are still good but just a bit weirdly shaped, but at the same time I don't wanna keep a potential fire hazard. 😅