Introduced in October 1993, the PowerBook Duo 250 added an active matrix screen to the Duo mix.

This plus an improved battery (which lasts 2.5 hours) did a great deal to increase the popularity of the Duo line.

Specs (via Low End Mac)

• Cpu: 33 MHz 68030
• Fpu: optional 68882 in dock
• Performance: 4.6 (relative to SE)
• Ram: 4 MB, expandable to 24 MB using a single Duo RAM card
• Rom: 1 MB
• Display: 640 x 400 84 ppi 4-bit active matrix
• Gestalt Id: 38
• Upgrade Path: Duo 280
• Weight: 4.2 pounds
• Adb Port: only with dock
• Scsi Port: only with dock
• Serial Ports: 1 DIN-8 RS-422 port on back of computer
• Power Supply: M7783
• See: Online resources and links for the PowerBook Duo 250