> My office has a the "open-office" trend, which pretty much prompts me to leave and to go various parts of the office during the day, or maybe even the library

> My office has a the "open-office" trend, which pretty much prompts me to leave and to go various parts of the office during the day, or maybe even the library, and only come back in for meetings. To me this sounds as you don't really have proper working offices. Maybe that is the problem you need to solve, instead of trying to maximize the battery life of your laptop?