Only applicable to Ni-Cad/Ni-MH is my understanding. The Li-ions don't suffer from memory effect and also have a pretty sophisticated controller in the battery to make it all work. >>Basically, just put the battery in and then ran the Graphing >>Calculator Demo until the PB generated the 'going to sleep' warning. > >Does Battery Amnesia work on a 2400 ? > >Mad Dog Ralph Mawyer, Jr. San Antonio, Texas Associate Editor mac2400 ... http://www.sineware.com/mac2400 Your PowerBook 2400 Reference Site "They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety." Benjamin Franklin, 1759.