Powerbook 1xx temperature

[Shaddam IV]

Hello, when I run the Powerbook 160 for a while - an hour or so - its bottom becomes warm in the left back area (where the daughterboard sits - only that the daughterboard doesn't touch the bottom). I guess it's around 30-35° C or so. Is this normal? I used to have a 170 waaaaaay back and I don't remember whether this is normal or no.

Thanks! Kind regards, Karl