From Stargate Wiki
11'' x 16'' x 1.25''
The laptop is similar to Earth-based laptops except having two small screens in place of one large one. The laptop is capable of having two Life Signs Detector's inserted into its screen area. There are also five crystal slots in the screen area. The keypad area has thirteen crystal slots, two of which are removable and replaceable.
When John Sheppard and Rodney McKay entered into the virtual reality world being used by the crew of the Aurora while in stasis, the Lanteans aboard were using these laptops while preparing to modify the hyperdrive to reach Atlantis. Dr. McKay used one of these laptops when investigating an energy field offworld. (ATL: "Aurora", "Epiphany")
On the Aurora