[criddell]

Linux is pretty heavy compared to something like EPOC that the Psion used. That machine would run 20 hours on a pair of AA batteries.

We’ve come a long way since then. Surely a month on a pair of AA batteries should be possible?

[xwdv]

But we have lithium now.

[criddell]

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.