L8 - T8C - S2 - Battery Replacement

True

• This power supply is provided as an external AC adapter

  • Typically universal/”auto-switching”

  • Operate from 110–240 VAC 50/60 Hz supply

True or False: To operate from building power, the laptop needs a power supply to convert the AC supply from the power company to the DC voltages used by the laptop's components

AC Adapter

Converts AC building power to DC power required for the laptop components

• Typically universal (or auto-switching)

• Operate from any 110–240 VAC 50/60 Hz supply

• Rated for their power output (ranging from around 65–120 W)

• Connects via DC jack or USB Port

True

• However, the laptop will not work/charge

True or False: Plugging a fixed-input 220–240 V adapter into a 110–120 V supply won't cause any damage

False

• This will likely cause damage to the laptop

True or False: Plugging a fixed-input 110–120 V adapter into a 220–240 V supply won’t cause any damage

Battery

Power source for a portable computer, typically a rechargeable Lithium-ion (Li-ion) type

• Li-ion versions typically available in 6-, 9-, or 12-cell versions

  • More cells provide a longer charge

• Connector and form factor are typically specific to the laptop vendor and to a range/model

• A small coin cell ____ is also used in a computer to power CMOS RAM

• Before inserting or removing the battery pack, you must turn the machine off and unplug it from the AC wall outlet

• A portable battery is usually removed by releasing catches on the back or underside of the laptop

Instructions for removing battery

Trickle charge

When a laptop is in use and connected to the building power via its AC Adapter, the laptop is _____ charged

• A good power management driver can be used to ensure a proper charging regime and prevent repeated ____ from damaging the laptop

Battery Life

Indicates how much charge the battery has left to operate with

• Li-ion ____ is affected by:

  • Being fully drained of charge

  • Being held continually at 100% charge

  • Heat (store below 20ºC and reduce charge to 40%)

  • Age (maximum usable life 2-3 years)

Power Management Driver

Software on a computer that enables users to manage battery life

• Used to ensure a proper charging regime and prevent repeated trickle charging from damaging a laptop

True

True or False: If you charge a battery and the run time is substantially decreased, you may need to purchase a new battery