Coffee has its caffeine. Energy drinks have Taurine (besides caffeine as well). Taurine gives you energy and keeps you awake.
This app will keep your system awake for a defined period of time. It will pause the energy settings and prevent the screensaver from starting. This is useful if you have a task, which takes a long time. Taurine is a tiny program for the status bar. You can at all times deactivate Taurine and run on normal energy saving settings.