I own an Amiga1200 but I know that A4000 simm socket can use only simm from 1mb ram to 4mb and not over this size.
And i know also that there are 2 different simm socket in the A4000;the first is used to expand "Chip-Memory" and the other for "Fast-Memory"...(perhaps for Chip-Mem,You can use only 2 simm of 1mb ram).(I think 1socket for Chip and 2 socket for Fast)
In my opinion you have to change your HD to another more bigger and faster...for example a standard 40gb,is not expensive and i'ts also faster than an old HD.tTo use HD bigger than 2gb (or 4gb..i'dont remember)you mustr use OS3.5 or 3.9.You can change battery but be shure to buy a new one of the same kind.
