When I'm on laptop battery I switch to "LispIDE", which despite the name is an ultra-lightweight Lisp text editor for Windows. It has the absolute bare minimum;

When I'm on laptop battery I switch to "LispIDE", which despite the name is an ultra-lightweight Lisp text editor for Windows. It has the absolute bare minimum; runs a lisp process, highlights syntax, indents code, and is able to evaluate code in the editor buffer. I get so much done in the 2-3 hours I'm at the coffee shop, I also take copious notes in notepad, by the time I come back home I can fire up Emacs and cut and paste tiny little independently developed routines and classes, and orchestrate them to a good chunky module. I only wish I could get more mileage out of this little brain of mine for more than 4 hours a day. I have to stimulate myself with hackish sub-projects and chase "performance" red-herrings just to keep going.