Ever since I updated to Big Sur, I've noticed my battery life on my intel MacBook Pro 2020 13 inch is quite poor. It lasts about 4 or 5 hours from full to 0 when I'm web browsing (I always use safari). This is far below the 10 or 11 hours or so reviewers seem to get on the device. I got coconut battery so I know I'm 200 cycles in and the battery is at 87% capacity so it's not battery degradation. I've reset SMC and PRAM multiple times to no avail. I also can't find a good source of the drain, my activity monitor doesn't show any processes taking up huge CPU usage, I see no more than 20% use when I'm using Safari.

I have no idea what to do here, has anyone faced this problem and knows a solution??


  • Do you like a bright screen? Backlit keyboard?
    – Solar Mike
    Commented Jul 23, 2021 at 20:13
  • @SolarMike Hi Mike, I use the lowest backlight on the keyboard and usually run about 30 or 40% screen brightness. Commented Jul 23, 2021 at 20:26

1 Answer 1


I'd recommend clicking on the battery icon in your menubar. This is a quick way to determine which applications or features are consuming the most battery.

Here's mine:

Using significant energy

Also, in addition to the CPU usage stats, Activity Monitor includes an "Energy" tab that includes columns for "Energy Impact" and "12 hr Power" that are worth investigating.

Activity Monitor "Energy" tab

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