Sure. As long as they are a standard battery that will still be around 25 years from now. In the year 2050 you can probably take your Psion 5 from 1998, insert

Sure. As long as they are a standard battery that will still be around 25 years from now. In the year 2050 you can probably take your Psion 5 from 1998, insert AA batteries, and start writing.