So, my laptop is at 90% power, and says I only have 3 hours and 50 minutes left. I have brightness all the way down, and Im using integrated graphics. Apple claims that I would get 8-9 hours on a single charge, which I am not getting. What gives?
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MacBook Pro 15 Battery Life
- Thread starter creeman
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Have a look at Activity Monitor ( Applications / Utilities / ) and select All Processes and sort by CPU to see what the culprit may be.
image below uses sorting by CPU as an example
Mac OS X: Reading system memory usage in Activity Monitor
Making The Most of Activity Monitor
image below uses sorting by CPU as an example
Mac OS X: Reading system memory usage in Activity Monitor
Making The Most of Activity Monitor
your not alone, I have the same problem, I use Safari and Spotify most of the time and I never get more than 4 hours, I have calibrated battery and only has 53 cycles 
your not alone, I have the same problem, I use Safari and Spotify most of the time and I never get more than 4 hours, I have calibrated battery and only has 53 cycles
I only have 7 cycles....
98%. The installer finished, and now the laptop is at 37% battery, and it says it has 2:39 left with brightness at about half, so that seems about right I think.