the Galaxy S7 Edge is the clear winner here. After all, it has a battery capacity of 3,600mAh, which is a bit more than the iPhone’s 2,915mAh capacity. In reality, however, battery life is a lot more complex, and depends heavily on the display, operating system, usage, and more. Still, most tests put the Galaxy S7 Edge well ahead of the iPhone 6S Plus when it comes to battery life, despite the fact that there’s more to a battery than its innate capacity. Apple has long been at war with device thickness at the cost of battery size, and while you could probably squeeze enough juice out of the iPhone 6S Plus for a full day’s use, Samsung seems more concerned with getting its users through the day than offering the slimmest device possible.