![](/images/new-backgrounds/1153150/15315035x1.webp)
Bottom components
Component | Description | |
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(1) | Hard drive and WLAN module compartment | Holds the hard drive and, for select models only, the wireless LAN |
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| (WLAN) device. |
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| CAUTION: To prevent an unresponsive system, replace the |
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| wireless module only with a wireless module authorized for use in |
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| the computer by the governmental agency that regulates wireless |
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| devices in your country or region. If you replace the module and |
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| then receive a warning message, remove the module to restore |
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| computer functionality, and then contact technical support through |
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| Help and Support. |
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(2) | Memory module compartment | Contains the 2 memory module slots. |
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(3) | Mini Card compartment | Holds a WLAN device (select models only). |
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| CAUTION: To prevent an unresponsive system, replace the |
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| wireless module only with a wireless module authorized for use in |
|
| the computer by the governmental agency that regulates wireless |
|
| devices in your country or region. If you replace the module and |
|
| then receive a warning message, remove the module to restore |
|
| computer functionality, and then contact technical support through |
|
| Help and Support. |
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(4) | Battery release latch | Releases the battery from the battery bay. |
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(5) | Battery bay | Holds the battery. |
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(6) | Vents (4) | Enable airflow to cool internal components. |
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| NOTE: The computer fan starts up automatically to cool internal |
components and prevent overheating. It is normal for the internal fan to cycle on and off during routine operation.