The 600 series was designed to be a more portable version of the 770 series, featuring slimmer dimensions and a weight of around 5 pounds (2.3 kg), by using lightweight but strong carbon fiber composite plastics.

The 600 series also introduced the new UltraSlimBay (not to be confused with the UltraBay Slim as found on the later T40/T60 series), as well as easily interchangeable RAM and hard drives; all 600 series machines shipped with 32 or 64 MB of RAM integrated on the motherboard from the factory.

None of the 600 series models included wireless adapters or Ethernet ports as an option, but these could be added through a third-party PCMCIA/CardBus card.

Li-Ion Battery - 3 hr (Sep 98) Color 800x600 1024x768 66 MHz Bus 512 KB cache 66 MHz

(1999) Color 66 MHz Bus 256 KB cache Li-Ion Battery - 3 hr