The PowerBook 2400c was designed to replace the discontinued Duo series – particularly the 2300c – with something very small and light (just 4.4 lb./2.0 kg). Although the keyboard is slightly smaller than usual, those who have 2400s just love these small PowerBooks. And with its 8.5″ x 10.5″ dimensions, the 2400c had the smallest footprint of any Apple notebook to date (89.25 square inches vs. 93.5 for the PowerBook 100).

Memory expansion is limited to 112 MB, which can be extended by the use of RAM Doubler or Virtual Memory. Using a hard drive larger than 3 GB may preclude the use of SCSI Disk Mode, according to PowerBook Hard Drives: The Essential Upgrade .

Although the 2400c doesn’t natively support CardBus , it can be modified to support it.

Specs (via Low End Mac)

• Cpu: 180/240 MHz PPC 603e
• Bus: 40 MHz
• Performance: 294, MacBench 4
• Ram: 16 MB, expandable to 112 MB
• Rom: 4 MB
• Hard Drive: 1.3 GB EIDE
• Vram: 1 MB
• Display: 10.4″ 16-bit 800 x 600 96 ppi color dual-scan or active matrix
• Adb: 1 port for keyboard and mouse
• Scsi: HDI30 connector on back of computer
• Serial: 1 DIN-8 RS-422 port on back of computer
• Weight: 4.4 pounds with battery
• Level 2 Cache: 256 KB
• Video Out: VGA port
• Cd-Rom: none
• Pc Card Slots: 2 (CardBus compliant on the Japanese 2400c, and the US version can be modded to support CardBus.)
• Infrared: supports IrDA and Apple’s IRtalk protocol
• Gestalt: 307
• Size: 1.9″ x 10.5″ x 8.5″
• Power Supply: M5937
• See: Online resources and links for the PowerBook 2400c