You can use any 36W (24V/1.5A) or 45W (24V/1.875A) power adapter with a 2400, including any adapter that came with a 280c, 2300c, 1400, 2400, 3400, PB G3, iBook, or PB G4 (except for white iBooks and metal PowerBooks, whose adapters are electrically ok, but won't fit). The 25W (24V/1.04A) adapters could be used in a pinch but aren't advised for general use. Third party adapters should be fine too as long as they are at least 36W. Ivan. ---------------- >I was under the impression that a 2400 could run on a Duo adapter, >but this excerpt from an Apple document has me confused: > >M7783 (Duo Adapter) >PowerBook Duo 210, 230, 250, 270c, and 280 computers include a 25 W >power adapter. > >M2693 (Duo Adapter) >The PowerBook Duo 280c included a 36 W power adapter that works with >all PowerBook Duo computers. > >PowerBook 2400 >M5937 >36 W AC adapter for the Macintosh PowerBook 2400c computer. > >I have both adapters, 7783 & 2693. Will either of these power the >2400? Or do I need to buy the 5937 adapter. I hope not!! Thanks. >