Mobile Devices, Batteries, and Peripherals

Mobile Devices

  • Mobile devices are computers: They include CPUs, RAM, storage, power systems, and peripherals.
  • Mobile devices are portable and battery-powered.
  • They can be general-purpose (tablets, smartphones) or optimized for specific tasks (fitness monitors, e-readers, smartwatches).
  • Mobile devices are integrated, meaning components are built together and not easily taken apart.
  • Smaller devices have more integrated components.
  • CPU, RAM, and storage may be soldered to the motherboard.
  • System on a Chip (SoC):
    • Packs CPU, RAM, and sometimes storage onto a single chip.
    • Small and uses less battery power.
  • Mobile devices can use peripherals (e.g., smartphones with Bluetooth headphones).
  • A fitness tracker can be a standalone device or a peripheral to a smartphone.
  • Mobile devices use standard or proprietary ports and connectors.
  • Specific adapters or connectors may be needed for charging or connecting to a computer.
  • Custom charging interfaces might be used for waterproof devices.
  • Standard power, data, and display connector types:
    • USB-C
    • Lightning adapter
    • Mini USB
    • Micro USB
    • Micro HDMI
    • Mini HDMI
    • Mini DisplayPort
  • Mobile devices use operating systems and application software designed to maximize performance due to their limited size and power.
  • IT support specialists may be responsible for setup, troubleshooting, repairing, and replacing mobile devices.
  • Mobile devices contain personal data.
  • Bring Your Own Device (BYOD): Some organizations allow personal devices for work.
  • Respect user privacy and refer to the organization's policy.

Rechargeable Batteries

  • Mobile technology uses rechargeable batteries.
  • Rechargeable devices might have an external charger for removable batteries, a cradle stand, or wireless charger.
  • Charge cycles: One full charge and discharge of a battery.
  • Battery lifespan is measured in charge cycles.
  • As a battery ages, it takes longer to charge and holds less charge.
  • Compare current cycle count to the rated cycle count to estimate remaining life.
  • External power source needed to add power to a battery (wall outlet, another battery, solar panel).
  • Charging circuit manages power transfer from the external power source to the rechargeable battery.
  • Portable power supplies power the device while charging the battery.
  • Use the correct charger for the device to avoid damage.
  • Rechargeable batteries can be damaged by extreme temperatures.
  • Damaged batteries can swell, rupture, or catch fire.
  • Know how to safely handle damaged batteries.
  • Replace batteries at the end of their life.
  • Devices may slow down to extend battery life.
  • Check battery life if a device is running slowly or shutting down unexpectedly.
  • Some devices have user-replaceable batteries; others require professional replacement.
  • IT support specialists may need to replace batteries or send devices out for battery replacement.
  • Troubleshooting battery life and device charging involves ensuring compatibility between the charger, battery, and device.
  • Familiarize yourself with iOS and Android battery-saving tips.

Peripherals

  • Peripherals are external devices that add functionality to a computer (e.g., mouse, keyboard, monitor).
  • USB (Universal Serial Bus) devices are popular connections.
  • Common USB versions: USB 2.0, USB 3.0, and USB 3.1.
  • Units:
    • MB: Megabyte (unit of data storage).
    • Mb/s: Megabit per second (unit of data transfer rate).
    • 1 byte=8 bits1 \text{ byte} = 8 \text{ bits}
    • To transfer a 1 MB file in a second, you need an 8 Mb/s connection.
  • USB ports:
    • USB 2.0: Black.
    • USB 3.0: Blue.
    • USB 3.1: Teal.
  • USB ports are backward compatible.
  • USB Type-C is replacing many peripheral connections as a universal standard for display and data transfer.

Display Peripherals

  • DVI cables output video only.
  • HDMI cables output both video and audio.
  • DisplayPort also outputs audio and video.
  • USB Type-C can handle audio, video, data transfer, and power.
  • IT support specialists work with peripherals like USB and display devices frequently.