![](/images/new-backgrounds/1220456/22045651x1.webp)
Bottom components
Item | Component | Function |
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(1) | Battery bay | Holds the battery and a wireless subscriber identity |
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| module (SIM). The SIM slot is located inside the battery |
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| bay. |
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| NOTE: The battery must be installed for the SIM to |
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| operate. |
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(2) | Battery release latch | Release the battery from the battery bay. |
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(3) | Docking connector | Connects an optional docking device. |
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(4) | Vents (7) | Enables 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 |
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| normal for the internal fan to cycle on and off during |
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| routine operation. |
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(5) | Memory module compartment | Contains a memory module slot and an HP Broadband |
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| Module. |
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| CAUTION: To prevent an unresponsive system, |
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| replace the wireless module only with a wireless module |
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| authorized for use in the computer by the governmental |
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| agency that regulates wireless devices in your country or |
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| region. If you replace the module and then receive a |
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| warning message, remove the module to restore |
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| computer functionality, and then contact technical |
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| support through Help and Support. |
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(6) | Hard drive bay | Holds the hard drive. |
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(7) | Business card holder | Holds an optional business card. |
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(8) | Accessory battery connector | Connects an optional accessory battery. |
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18 Chapter 2 External component identification