External component identification
Bottom components
Item | Component | Description |
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1 | Hard drive bay | Holds the hard drive, memory module slots, WLAN module (select models |
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| only), and WWAN module (select models only). |
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2 | Vents (4) | Enable airflow to cool internal components. |
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| ✎ The computer fan starts up automatically to cool internal components |
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| and prevent overheating. It is normal for the internal fan to cycle on and |
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| off during routine operation. |
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3 | Speaker | Produces sound. |
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4 | Battery bay | Holds the battery and subscriber identity module (SIM). |
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5 | Charge level indicator | Displays the approximate remaining battery charge. |
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6 | Accessory battery connector door | Slides open to expose the accessory battery connector. |
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7 | Accessory battery connector | Connects an optional accessory battery. |
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8 | Battery release latch | Releases the battery from the battery bay. |
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9 | Docking connector | Connects an optional docking device. |
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Maintenance and Service Guide |
