Originally Posted by dalbir4444
That's not of much use to someone who bought the 4S because of the battery life benchmarks based on the 'incorrect' tests.
Testing methodologies often change, as long as the methods are documented properly the results are still relevant.
The goal in any of these these tests is to mimic as closely as possible typical usage that isn't exactly the easiest thing to codify (for obvious reasons), hence testing methods are improved to get closer to that goal.
Any potential purchaser should closely consider the testing method being used and determine whether their usage is similar. Simply consuming the numbers without considering the method is what I would call being a 'poor consumer.'
I think the following post is a good example of problem:
Originally Posted by onthecouchagain
For what it's worth, there's an entire thread going on at the iPhone forums with varying results of the iPhone 5 battery experience ranging from poor to good.