FWIW, I "honestly" get about 7-8 hours out of my MacBook Pro when doing light coding (small C/C++ project builds every five minutes, tweaking my website, writing some shell scripts), and 4-5 when doing "heavy" work such as iOS development. I can eke out 10 or more hours if I only read Mail and Hacker News :P

> My fan comment was a joke about Slack's efficiency.

Hence the "lol" ;)