![](/images/new-backgrounds/1213414/21341439x1.webp)
External component identification
Bottom components
Item | Component | Function |
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1 | Battery bay | Holds the battery. |
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2 | Battery release latch | Releases the battery from the battery bay. |
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3 | Vents (5) | Enable airflow to cool internal components. |
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| ✎ The computer fan starts up automatically to cool internal |
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| components and prevent overheating. It is normal for the |
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| internal fan to cycle on and off during routine operation. |
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4 | Wireless module compartment | Holds a wireless LAN module. |
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| Ä To prevent an unresponsive system, replace the wireless |
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| module with only a wireless module authorized for use in |
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| the computer by the governmental agency that regulates |
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| wireless devices in your country or region. If you replace |
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| the module and then receive a warning message, remove |
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| the module to restore computer functionality, and then |
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| contact technical support through Help and Support. |
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5 | Hard drive bay | Holds the hard drive and contains the memory module slots. |
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Maintenance and Service Guide |