Final answer:
The claim about the quick mass adoption of wireless charging is not supported by evidence, unlike other statements that reflect industry trends or information within the provided text.
Step-by-step explanation:
Among the provided statements regarding wireless charging and the technology's adoption and improvement, Option C ('Mass adoption of wireless charging may also be quick') is the claim that appears to be not supported by evidence. There is no clear evidence or discussion provided that would support the rapidity of mass adoption. The other claims, such as wireless charging being commonplace in low-power gadgets (A), consumers having the current ability to retrofit devices (B), and technology companies working on mitigating power differential issues in induction charging systems (D), are supported either by evidence within the text or are well-established industry trends.