Weakening the Battery Life Claim

In a recent advertising campaign, a smartphone manufacturer asserted that its latest model has the longest battery life of any smartphone on the market. The campaign highlighted numerous positive customer reviews and claimed that the device can last up to 48 hours on a single charge. However, some tech analysts have expressed skepticism about these claims, pointing out that battery life can vary significantly depending on how the device is used. They also noted that the manufacturer only showcased reviews from early adopters rather than a broad demographic of users.

The smartphone manufacturer is now defending its battery life claims by stating that the tests conducted were based on typical use scenarios they expect most consumers to experience, which included limited video streaming and basic applications.

Which of the following, if true, would most seriously weaken the manufacturer's argument about the superiority of its smartphone battery life?