About the low battery indicator

If the low battery indicator appears on the screen of your MacBook, MacBook Air, or MacBook Pro, the computer is running out of battery power. To prevent it from going to sleep, connect it to its power adapter.

If you see a flashing low battery indicator

If the low battery indicator flashes red and black, the battery has low charge (typically 1%) and is not connected to a power adapter. The computer could also be connected to a lower-power adapter than the one that came with it. 

The flashing lasts for approximately eight seconds. Then the computer goes to sleep.

To wake the the computer, connect it to the appropriate power adapter, or wait for the lower-wattage adapter to charge the battery.

If you see a solid (not flashing) battery indicator

If the battery indicator appears on the computer screen for approximately 8 seconds, the battery is nearing the end of charge capacity. After eight seconds, the computer goes to sleep.

To wake the computer, connect it to a power adapter.

If the screen of your computer is black

If the battery is completely out of charge (at 0% capacity), the screen of the computer is black because it's asleep.

To wake the computer, connect it to a power adapter. It make take a few minutes for the battery to get enough charge to start up the computer.

Learn more

  • If the low battery indicator appears but your Mac won't start, see this article.
  • If the battery doesn't appear to be charging after a reasonable period of time, see this article on resetting the SMC.
Last Modified:
Helpful?

Additional Product Support Information

Start a Discussion

in Apple Support Communities
See all questions on this article See all questions I have asked
United States (English)