220-801 · Question #801
A user has purchased a laptop that has no means to charge the battery. Which of the following would the user MOST likely purchase?
The correct answer is B. AC adapter. An AC adapter converts AC wall power to the DC voltage required to charge a laptop battery and power the device.
Question
A user has purchased a laptop that has no means to charge the battery. Which of the following would the user MOST likely purchase?
Options
- AUSB cable
- BAC adapter
- CPCMCIA card
- DReplacement battery
How the community answered
(57 responses)- A7% (4)
- B88% (50)
- C2% (1)
- D4% (2)
Why each option
An AC adapter converts AC wall power to the DC voltage required to charge a laptop battery and power the device.
A USB cable can transfer data and deliver limited power (up to 500mA on USB 2.0) sufficient only for small peripherals, not for charging a full laptop battery.
An AC adapter is the external power supply that steps down and rectifies 120V/240V AC mains power to the specific low-voltage DC required by the laptop for operation and battery charging. Without it, a laptop with no charging mechanism has no way to replenish the battery from an external power source.
A PCMCIA card is an expansion card that adds functionality such as Wi-Fi or storage to a laptop and is entirely unrelated to power delivery.
A replacement battery provides additional stored charge but does not solve the root problem - without a charger the replacement battery will also eventually deplete.
Concept tested: Laptop AC adapter function and use case
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