None of my Versa have leaked at all (40EC, V/50, M/75, P/75). I have heard via Beige-O-Vision's video that the Bridge batteries in these can leak. They are located above the HDD tray. The main battery can also corrode but it's so well sealed you won't know until you pop the cover. The main batteries are NiMH and well sealed. They are also still seemingly readily available rebuilt/new for around $50 so you can still replace rather than rebuild with new cells. The newer batteries seem to have better maH than stock as well (4400 vs. 3400 - and around 2hrs vs. 1.5hrs).

The CMOS Batteries on these are all lithium Ion Coin cells....per below....
Ultralite (PC-410/420/430-XXXX) - CR2302 size soldered to the bottom of CPU board, could replace with a holder easily
E-series (PC-440/450/460-XXXX) - CR2430, socketed, on top of CPU Board
V-Series (PC-7xx) - CR2430, socketed, under Memory Door (longer cover than usual)
M-Series (PC-470/480/570-XXXX) - Mac style Tadiran Barrel with Molex connector located under cage in Battery Bay
P-Series (PC-490-XXXX) - CR2430, molex, located under keyboard on metal subframe over battery board

My copy of a COMPAL BC380 came with severe battery damage from the CMOS/resume battery pack. In this case, it was 4 AAA NiCd cells in the front next to the floppy drive. I had to fix some traces on the keyboard. I already got new cells, but I didn't yet get around to install them.

adalbert wrote on 2021-02-20, 14:06:

I will add some to that list. But as was stated earlier, everything that has batteries can be damaged at some point (though I th […]
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I will add some to that list. But as was stated earlier, everything that has batteries can be damaged at some point (though I think that mainly Ni-Mh and Ni-Cd are prone to leak, lithium batteries not so much).

Laptops with Ni-Mh batteries:
Toshiba Libretto 70CT/100CT/110CT (and one of them has leaked)
Texas Travelmate 4000M (leaked)

Post 2000- laptops still using Ni-Mh batteries:
Dell Inspiron 8100/8200 - pretty big battery under keyboard. Didn't leak, but that would be a huge mess if it ever does.
Dell Inspiron 8600 - battery has it's own compartment, it's under a lid next to the main battery. It didn't leak, but even if it leaks, it probably won't be super disastrous.

And something interesting: Siemens Nixdorf PCD-4/5ND. 486/Pentium 1 laptop with rechargeable lithium battery soldered to the mainboard. I don't think that they are prone to leak as much as Ni-Mh.

creepingnet wrote on 2021-02-26, 18:59:

None of my Versa have leaked at all (40EC, V/50, M/75, P/75). I have heard via Beige-O-Vision's video that the Bridge batteries […]
Show full quote

None of my Versa have leaked at all (40EC, V/50, M/75, P/75). I have heard via Beige-O-Vision's video that the Bridge batteries in these can leak. They are located above the HDD tray. The main battery can also corrode but it's so well sealed you won't know until you pop the cover. The main batteries are NiMH and well sealed. They are also still seemingly readily available rebuilt/new for around $50 so you can still replace rather than rebuild with new cells. The newer batteries seem to have better maH than stock as well (4400 vs. 3400 - and around 2hrs vs. 1.5hrs).

The CMOS Batteries on these are all lithium Ion Coin cells....per below....
Ultralite (PC-410/420/430-XXXX) - CR2302 size soldered to the bottom of CPU board, could replace with a holder easily
E-series (PC-440/450/460-XXXX) - CR2430, socketed, on top of CPU Board
V-Series (PC-7xx) - CR2430, socketed, under Memory Door (longer cover than usual)
M-Series (PC-470/480/570-XXXX) - Mac style Tadiran Barrel with Molex connector located under cage in Battery Bay
P-Series (PC-490-XXXX) - CR2430, molex, located under keyboard on metal subframe over battery board

mkarcher wrote on 2021-02-26, 20:42:

My copy of a COMPAL BC380 came with severe battery damage from the CMOS/resume battery pack. In this case, it was 4 AAA NiCd cells in the front next to the floppy drive. I had to fix some traces on the keyboard. I already got new cells, but I didn't yet get around to install them.

Thank you all for your contribution 😀
Never thought that after the year 2000 some laptops were still using these kind of batteries 😖

My Toshiba Satellite 220CDS is completely ruined, it had both of the "classic" green Toshiba batteries in it. Both of the batteries were placed directly over the mainboard and leaked onto it everywhere.

This Satellite Pro 4300 from 1999 only has the smaller battery and it's placed far away from any other components:

But even here the battery started to leak and already has reached the mainboard:

The keyboard ribbon cable is slightly damaged but everything still works.
Even the Satellite S2800 from 2000 is using the same battery, in that model it's glued under the keyboard. That one apparently has not leaked...yet.