PowerBook Duo 280c

The PowerBook Duo 280c was a color subnotebook from the PowerBook Duo line that was introduced by Apple Computer on May 16, 1994.

Features
The Duo 280c featured a 66/33 MHz Motorola 68LC040 processor with an 8.4" active matrix color display that supported 640x480 in 8-bit color, and 640x400 ed in 16-bit color. The logic board contained 4 MB of RAM which could be upgraded to 40 MB. It also included an improved Type 3 battery.

The Duo 280c was compatible with the Duo Dock II and Plus models. Owners of the original Duo Dock required a top cover upgrade to accommodate the slightly greater thickness of the color display.

The Duo 280c shipped with System 7.1.1 (with PowerBook Duo Enabler v2.0) and could be upgraded to Mac OS 8.1.

Upgrade kits
Apple offered a PowerBook Duo 280 upgrade kit for owners of the Duo 250 and 270c. It included a replacement logic board with a 66/33 MHz Motorola 68LC040 processor, a new case bottom, stiffener assembly, Duo NiMH Type 3 battery, 36-watt power adapter, miscellaneous parts, and a stick-on label to indicate an upgraded unit.

Pre-existing owners of the Duo 280c or earlier models could upgrade to a 100 MHz PowerPC 603e processor with the PowerBook Duo 2300 upgrade kit.