Once setup is complete, the battery life will begin to reflect the regular activities you perform on your Mac.Your primary resource for viewing battery status is the battery status menu.

The battery might appear to stop charging between 93 percent and 99 percent.

This behavior is normal and will help to prolong the overall life of the battery.

For assistance identifying the proper adapter, review Find the right power adapter and cord for your Mac notebook.

Additional adapter troubleshooting is available in Troubleshooting Mag Safe adapters. Occasionally, the battery might not show a full charge (100%) in mac OS, even after the power adapter has been connected for an extended period of time.

Your notebook battery life depends on your computer's configuration and how you're using the computer.

Here are some settings and steps you can take to get the most from of your Mac Book, Mac Book Air, or Mac Book Pro battery.

If you have a large amount of data to transfer over Wi-Fi, it might take a few days for your Mac to finish its setup process.

It's best to keep your computer connected to a power source during this time.

If the battery in your Mac Book, Mac Book Air, or Mac Book Pro is fully drained of power, the battery will put itself into a low power state to preserve its ability to charge in the future.

Connect your Mac Notebook to AC power and allow it to charge for at least five minutes.

The Energy Saver pane in System Preferences has options to help improve the battery life on your Mac notebook when it's idle.