A checked box means that you completed the observation. It does not mean the device passed a certified test. This list does not inspect battery health, storage, internal damage or ownership. Use the manufacturer’s procedures for anything outside these browser checks.
Keep the comparison fair
Note the connection, operating system, browser and display brightness separately. Compare the same device on another computer where possible. Reproduce an unexpected result before drawing a conclusion. Reports from these tools contain observations, not a warranty claim, repair guarantee or proof of ownership.