I would like to know how long was my battery running since it's last charge. There is a built-in time-remaining counter but I would like a time-used counter.

3 Answers 3


Starting with Mavericks (OS X 10.9), this is available in Activity Monitor. Open Activity Monitor from the /Applications/Utilities folder, and go to the Energy tab. The center pane of the statistics at the bottom of the window includes the amount of time since you last unplugged the charger, which appears shortly after you switch to battery power.

Select the energy tab
Battery time at bottom of center pane

  • 7
    That's great, but it shows the time since the macbook has been unplugged, whether it was used or in sleep mode. Is there a way to filter out sleep time ?
    – Render
    Nov 20, 2013 at 7:47
  • 1
    Not that I know of. One way to think of it is that it is using battery power when asleep, just not as much. I suppose if you really want to ignore sleep time, you could calculate it manually from that counter and data from pmset -g log on the command line, but that seems like more effort than it's worth.
    – ughoavgfhw
    Nov 20, 2013 at 17:29
  • 1
    Agreed. While it uses minimal battery power during sleep, the counter still adds up the time the laptop was set to sleep. For example, 5 hours of total sleep time counts as 5 hours since battery was discharged, even though it uses 1-2% power.
    – Render
    Nov 20, 2013 at 18:47
  • Does this include the time that it was completely shut down Jan 27, 2017 at 13:12
  • this might be helpful
    – McLawrence
    Sep 27, 2017 at 7:43

You can try using the app Battery Truth on the Mac App Store. It costs $2.99 CAD and is supports English and Russian. Though it won't work if you Mac OS is older than 10.10.

The app will tell you:

  1. How much longer the battery will last
  2. What time the current charge will last you until
  3. How long the battery will last on a full battery
  4. How long the computer has been running on battery power for
  5. And during that time how much of it the computer was asleep or running
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    – fsb
    Nov 24, 2017 at 17:48

There is now a "Battery History" screen in recent versions of macOS:

Battery history

... and one can roughly count the number of hours from the chart, for example, on the example above, the last three blue bars are three hours of uptime, overall, my MacBook was turned on for roughly 6–7 hours on the example above.

I don't know why macOS doesn't provide a simpler way to get this single value.

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