How would an iPhone with half the battery of competing smartphones ever have won the test, and why didn’t Which test a similar device? Which? is getting lots of attention today on strength of its report that claims smaller batteries don’t last as long as larger batteries. That’s the only logical discovery the organization made in a flawed-by-design smartphone battery life test that’s being widely reported. What the report’s headline doesn’t make clear is that the iPhone 7 in the test has a 4.7-inch display, while all three of the other smartphone models tested are larger (5.1-inches, or more), and...