Claim to the outside world that the highest support () users.

Question

Options

• ANo upper limit
• B20W
• C5W
• D10W

• A
  8% (5)
• B
  15% (9)
• C
  73% (44)
• D
  3% (2)

Explanation

Option C (5W) is correct because the standard publicly advertises 5W as the maximum guaranteed power level for universal device support under the basic wireless charging specification. This figure represents the baseline that all compliant devices must reliably deliver, making it the value formally "claimed to the outside world."

Option A (No upper limit) is incorrect because any published standard must define a ceiling to ensure device safety and interoperability. Option B (20W) refers to a higher fast-charging tier that applies only to devices specifically rated for extended power profiles, not the universal baseline. Option D (10W) is an intermediate extended-power level available for select compatible devices, not the universally supported baseline figure.

Memory tip: Think of 5W as the "safe floor that is advertised as the ceiling" for universal compatibility. The number 5 also visually resembles an "S" for Standard, helping you associate it with the standard baseline claim.

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