School owned MacBooks should only use the supplied Apple 45W MagSafe2 Power Adapter for the 11" Air. Using a different charger can void the warranty of the laptop and can also cause battery damage. (See below for an image of the proper adapter.)
The MagSafe connector on the end of the cord is magnetic and allows the power adapter to be safely disconnected in the event of tripping over the cord.
Magsafe2 Connector and Power Brick
The MacBook needs to be fully charged before bringing to campus each school day.
The first evening with the laptop (or with a replacement), you will need to charge the device for a full 12 hours. Subsequent evenings will only need a few hours to complete a full charge. Students can charge their laptop on campus, but available power outlets are scarce. Outlets are provided in the Matthews Library for student use.
We recommend that families designate a location in the house as a “charge station”. Good locations are near the entrance to the garage/front door or in the kitchen. Charging locations outside the student’s bedroom will hopefully lead to restful evenings.
When the Power Adapter is not in use it should be wrapped properly, by creating a loose loop, and then wrapping around the collapsible prong located near the back of the adapter. Failure to wrap the cord properly can lead to cord damage. Physical damage caused to the power adapter is not covered under warranty and repair or replacement will be billed to the family.
Too much tension on the strain relief portion of the cord.
Proper cord wrapping.
Keep it away from extreme temperatures.
Your device is designed to perform well in a wide range of temperatures, with 62° to
72° F (16° to 22° C) as the ideal comfort zone. It’s especially important to avoid exposing your device to temperatures higher than 95° F (35° C), which can permanently damage battery capacity. That is, your battery won’t power your device as long on a given charge. Charging the device in high temperatures can damage it further. Even storing a battery in a hot environment can damage it irreversibly. When using your device in a very cold environment, you may notice a decrease in battery life, but this condition is temporary. Once the battery’s temperature returns to its normal operating range, its performance will return to normal as well.
MacBook Comfort Zone
MacBook works best at 50° to 95° F (10° to 35° C). Storage temperature: -4° to 113° F (-20° to 45° C).
Remove certain cases during charging.
Charging your device when it’s inside certain styles of cases may generate excess heat, which can affect battery capacity. If you notice that your device gets hot when you charge it, take it out of its case first.
Store it half-charged when you store it long term.
If you want to store your device long term, two key factors will affect the overall health of your battery: the environmental temperature and the percentage of charge on the battery when it’s powered down for storage. Therefore, we recommend the following:
- Do not fully charge or fully discharge your device’s battery — charge it to around 50%. If you store a device when its battery is fully discharged, the battery could fall into a deep discharge state, which renders it incapable of holding a charge. Conversely, if you store it fully charged for an extended period of time, the battery may lose some capacity, leading to shorter battery life.
- Power down the device to avoid additional battery use.
- Place your device in a cool, moisture-free environment that’s less than 90° F (32° C).
- If you plan to store your device for longer than six months, charge it to 50% every six months.
Depending on how long you store your device, it may be in a low-battery state when you remove it from long-term storage. After it’s removed from storage, it may require 20 minutes of charging with the original adapter before you can use it.
Optimize your settings.
Energy. The Energy Saver preference pane includes several settings that determine power levels for your MacBook. Your MacBook knows when it’s plugged in and runs accordingly. When using battery power, it dims the screen and uses other components sparingly. If you change this setting to maximize performance, your battery will drain more quickly.
Brightness. Dim the screen to the lowest comfortable level to achieve maximum battery life. For instance, when watching a video on an airplane, you may not need full brightness if the cabin lights are off.
Wi-Fi. Wi-Fi consumes power, even if you are not using it to connect to a network. You can turn it off in the Wi-Fi status menu in the menu bar or in Network preferences.
Applications and peripherals. Disconnect peripherals and quit applications not in use. Eject an SD card if you’re not currently accessing it.
Plug in and power on your MacBook to charge other devices.
Make sure your MacBook is plugged in and powered on when you’re using it to charge other devices via USB. Otherwise those devices may drain the battery in your MacBook faster than normal. If another device is connected to your MacBook when it’s turned off or in sleep or standby mode, the device’s battery may drain.