The Samsung Galaxy S III is rated as having a battery approximately 50% better than that of the iPhone 4S

  When I wrote the review for the Samsung Galaxy S III I told you that one of the things I really appreciated about this device was the battery. I can say that despite the 4.8 inch screen and the quad-core processor, the smartphone has a very good autonomy, much better than that of the iPhone 4S terminal. To demonstrate how good the battery of these smartphones is when making voice calls, those from Which they did a study that brings us the graph above. There the Samsung Galaxy S III is presented as having a battery autonomy of 12 hours, the HTC One X is presented as having an autonomy of 10 hours and 35 minutes, and the iPhone 4S has an autonomy of almost 8 hours.

  In the case of all smartphones, the results are different from those obtained in the case of this test, so we can conclude that autonomy is somewhere in the middle. Those from Which tested the smartphones in medium 3G reception situations and in the case of voice calls.