| M4180LL/A | PowerBook Duo Floppy Adapter(Discontinued) |
| M8061LL/A | Macintosh HDI-20 External 1.4MB Floppy Disk Drive (Discontinued) |
| M4186LL/A | PowerBook Duo Express Modem (14.4 max) (U.S., Canada, Japan) |
| M1835LL/A | PowerBook Duo Rechareable Battery (Type 1 & 2) (Discontinued) |
| M2780LL/A | PowerBook Duo Rechargeable Battery (Type III) (Discontinued) |
| M4178LL/A | PowerBook Duo Battery Recharger |
| M4174LL/A | PowerBook Duo AC Adapter |
| M4184LL/A | 4MB RAM Upgrade (Discontinued) |
| M4185LL/A | 8MB RAM Upgrade |
| M3171LL/A | Logic Board Upgrade (Discontinued) (200 series to 2300) |
| M1928LL/A | PowerBook Duo Dock (512kVram) (Discontinued) |
| M4181LL/A | PowerBook Duo Minidock (Discontinued) |
| M4219LL/A | PowerBook Duo Dock Plus |
| M2631LL/A | Duo Dock with 1MBVram and math coprocessor and 230MB hard drive (Discontinued) |
| M1865LL/A | Same as M2631LL/A but with 32k RAM cache and built-in Ethernet (Discontinued) |
| M1814Z/A | PowerBook Duo Top Cover Retrofit (Discontinued) (Upgrades older Duo Docks for use with color Duos) |
| M13114LL/A | PowerBook Duo Dock VRAM Expansion Kit (Discontinued) |
| M6775LL/A | PowerBook Duo Dock Math Coprocessor Kit (Discontinued) |
| M0417LL/A | PowerBook Ethernet NB Card (Discontinued) |
| M1921LL/A | Duo Dock II Upgrade (for any DuoDock prior to DuoDock II) (Discontinued) (Included 1MB VRAM and Ethernet.) |