Bottom
Component |
| Description |
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(1) | Battery bay | Holds the battery. |
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(2) | SIM slot | Supports a wireless subscriber identity module (SIM). The |
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| SIM slot is located inside the battery bay. |
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(3) | Vents (3) | Enable airflow to cool internal components. |
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| NOTE: The computer fan starts up automatically to cool |
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| internal components and prevent overheating. It is normal |
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| for the internal fan to cycle on and off during routine |
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| operation. |
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(4) | Hard drive bay | Contains the hard drive, the wireless LAN module slot, the |
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| WWAN module slot, and the memory module slot. |
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| CAUTION: To prevent an unresponsive system, replace |
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| the wireless module only with a wireless module authorized |
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| for use in the computer by the governmental agency that |
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| regulates wireless devices in your country or region. If you |
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| replace the module and then receive a warning message, |
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| remove the module to restore computer functionality, and |
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| then contact technical support through Help and Support. |
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(5) | Docking connector | Connects an optional docking device. |
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(6) | Charge level indicator | Displays the approximate remaining battery charge. |
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(7) | Battery release latch | Releases the battery from the battery bay. |
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(8) | Accessory battery connector | Connects an optional accessory battery. |
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(9) | Accessory battery connector door | Slides open to expose the accessory battery connector. |
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