How long does your device last on a single charge?

Title is the question.

My iPad 4 can go 3-4 days without a charge. Sometimes one day if I am using it constantly. My MacBook Pro lasts 12-13 hours if I am lucky, 9 hours average (ex. writing on Pages or web browsing), or 5-7 hours if watching anything online or iMovie or anything with significant energy. (Brightness is half for MacBook Pro, lowest-middle on iPad.)

(You can post "Time since Last Charge" and "Energy" stats/screenshots if you are so inclined. iOS, in General-Usage and in Mac, Activity Monitor and go to Energy.)