The battery indicator lights are located along the left side of the computer. This allows for quick and easy verification of the battery's charge status while the computer remains solidly in-place.
When you press the battery indicator light button, the corresponding flashes (or pattern of flashes) presents either the current charge status or a diagnostic status.
The chart below describes the behaviors you may see when you press the battery indicator light button.
|Battery indicator light behavior||Description and instructions|
|The first LED flashes for 5 seconds.||The battery has not yet been charged to what's required for a single indicator light. Ensure the MagSafe adapter is properly connected.|
|LEDs representing the current charge flash 5 times, then fade.||The battery is charging, but does not have a full charge.|
|All LEDs flash 5 times.||The battery needs to be replaced. Please schedule a service appointment with either an Apple Retail Store or an Apple Authorized Service Provider.|
|LEDs flash from left to right and back again 5 times.||The battery is not installed, or is not recognized. Verify that the battery is installed correctly.|
Note: Once the MagSafe power adapter is first connected to the computer, the MagSafe's LED glows. An amber light indicates the battery is charging. A green light indicates the battery is fully charged, or not installed correctly in the computer. For more information on using the MagSafe power adapter, see Mac notebook: Troubleshooting MagSafe adapters.
For tips on maximizing your notebook computer's battery charge, see Mac notebook: Tips for maximizing your battery charge.