My first laptop was a Compaq Armada 4130T.
These were made in 1995 or 1996(I think) and had a Pentium I. The 4130T was the high end model of the series, and had a 133mhz processor. It has 16mb of RAM on board, and two expansion slots. I think you can go up to 80mb. My first one was a gift from my parents in 1999-when it was actually still relatively current-and I later bought a second one when my first one started showing some signs of age.
In stock form, it was actually a pretty slim and trim laptop-a lot smaller than a Pismo or the like. It also had a neat hinged piece on the back that held a battery, could serve as a carrying handle, and could be folded under the computer to prop it at an angle. The floppy drive could be popped out and a battery(obviously a different form factor than the handle battery) stuck in its place.
There was also an expansion module for it that many folks called a dock, even though Compaq called it a "Mobile CD expansion unit." It doubled the thickness of the laptop(without adding much weight) and gave you a CD-ROM drive, a great set of Harmon-Kardon speakers(among the best I've ever heard on a laptop, and much better than the wimpy built in ones) as well as another expansion bay that could hold a battery of the same form factor as the one that went in the floppy bay.
So, add that up and you get a total of 3 batteries. You could get NiMH or Li-Ion batteries, although I only ever had Li-Ion(I still have a new, unopened floppy bay battery stashed away somewhere). Each Li-Ion batter was good for 3 hours or so, meaning it had a theoretical 9 hour battery life(of course it also took about that long to charge fully).
You could get a docking station for it, although it was basically a port replicator. I saw very few of them on Ebay.
Unlike the crummy laptops people remember Compaq for, that Armada was a solid piece of engineering. Of course I think it was also around $4K new. It is fanless, with the entire(magnesium) chassis acting as a heatsink. The magnesium also keeps the weight down.
Both of mine still run, although the display cable is "touchy" on one. The other is connected to my Lionel train layout via its RS-232 port(find many newer laptops with one of those). Lionel published all the serial communication protocols for the system I use, and I wrote a program that could control everything from the computer-in some ways it actually worked better than the Lionel-supplied remote(there have been some other 3rd party options that did the same thing as my program). Interestingly enough, after 20 years, the original Lionel equipment that I based all of this on is still being made and sold, although there are more updated(and backwards compatible) options.